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Guide to Snaps

New to snaps? This page has all the basic information you'll need to get started.



Tools:  Presses vs Pliers

What tool do I need to install snaps?

For plastic snaps:

     • If you want to start basic, all you need are pliers and plastic snaps. Most people start with the starter bundle listed here.  If you're unsure of what size you need, go for the size sampler pack listed here.

     • For heavier duty applications, you can opt for a table press. Aside from the press, you will also need snaps and dies.  If using size 20 plastic snaps snaps, a complete press bundle with all 3 products is available here.

               • If you want a different size of snaps, you will need to add the press, snaps, and press dies separately. First select the size of snaps you want, then purchase the dies labeled for that same size.

Please continue reading below for the benefits of pliers vs press and to help determine which would be best for you.

For metal snaps & grommets:

     • To install all types of metal snaps that we carry including open-ring, fashion spring, and utility spring, as well as grommets you need the snaps, a table-top press, and press dies that correspond to the specific snaps you are using.  You must purchase all 3 items through our store to ensure compatibility as our products are not compatible with other brands.

               • First, determine the size and style of metal snaps or grommets you want to purchase.

               • Then, add the DK93* table-top press.

               • Finally, add DK93* press dies that are labeled for the size/style of your metal snaps or grommets.

*Note: If you own the DK98 model press, just substitute with DK98 dies.


     • To install only open-ring grip/crimper style metal snaps, you can use our KX6 multi-functional heavy duty pliers.  These pliers come standard with the required dies for size 16. They also come standard with dies to install a variety of plastic snap sizes as well as to remove plastic snaps.  You will need to add the snaps separately to your shopping cart.


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What are the differences between using a snap press and snap pliers?
Snap pliers are a cheaper alternative to snap presses for plastic snaps.  Snap pliers are good if you're on a budget or for occasional use. If you plan to install a lot of snaps, use them for commercial resale products, or wish to use plastic snaps, metal snaps, and grommets, then the table press is recommended.

The benefits of the pliers are:

- More affordable.

- Extra dies for different sizes of plastic snaps can be purchased at an extremely low cost.

- Compatible with different brands of plastic snaps.

- Portable so they can be used to apply snaps to large items which cannot be moved.

- Convenient for travel.

- Do not take up a lot of space.

- Do not require as much arm or shoulder strength as the press.


The limitations of the pliers include:

- Cannot install metal snaps or grommets. (Exception: KX6 multi-functional pliers can install open-ring style metal snaps.)

- Significantly smaller clearance for fabric so you are limited to installing snaps closer to the edge of your fabric.

- May not always result in a uniform professional appearance of the snaps.

- Tedious when installing a large quantity of snaps.

- Not recommended for size 14 standard length plastic snaps.


Here's a quick video to give you an idea of how the pliers work:


 The benefits of a press are:

- With the appropriate dies, the press can be used to attach any of our plastic snaps, metal snaps, or grommets. At this time, there are no such corresponding dies for the pliers.

- The press results in a more uniform/even and professional appearance.

- With the pliers, you only have enough clearance to attach snaps to an area close to the edge of your fabric.  The press offers a greater amount of clearance for your fabric so that you can attach snaps farther away from the edge.  The press also provides a wider clearance for thicker/bulkier materials.

- If you are attaching a lot of snaps, the press will speed your work up a great deal, and can be converted into a foot press.

- Does not require as much hand or grip strength as pliers.


The limitations of a press include:

- More expensive start-up cost. Different dies are needed for each size, type, and style of snap.

- Heavier so more difficult to travel with.

- Dies need to be changed to accommodate sockets/females and studs/males (unless you have 2 presses).


Here's a quick video to give you an idea of how the press works:

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What are the differences between the 2 hand-held pliers models, K1 and K2?
Both models are intended for home use only and not for commercial applications.  Most new users are happy with whichever model they choose, though we do suggest that you stick to the model you are familiar with if you need to replace yours as there may be a learning curve if you switch. 

We recommend the K2 because it generally does a more consistent job of installing size 20 snaps, the most popular size, but there are pros and cons to both models.  You should base your decision on which size snaps you plan to use most often.  If you cannot decide, rest assured that for most users, it's not going to make much of a difference which model you choose.

Amount of pressure required Has a shorter metal shank so requires a bit more pressure to securely install a snap. Has a longer metal shank so requires a bit less pressure to securely install a snap, making it a little easier on arthritic hands.
Consistency of results Has a slightly higher rate of the center prong of size 20 snaps being flattened unevenly. Usually this is just cosmetic but can ocassionally cause functional issues. Size 20 snaps tend to be centered better.
Ease of use Easy to use. Easy to use.
Quality appearance & feel Has more of a "quality" appearance and feel. Handle is molded to fit the curves of your fingers, though most people don't notice any significant benefit to this. Pliers can sometimes squeak. The Plain Jane of pliers. Simplified appearance, not as visually appealing as the K1.  Pliers can sometimes squeak.
Parts Parts will need to be replaced periodically. Parts will need to be replaced periodically.
Size 20 compatibility Compatible. Compatible. Does a superior job of installing size 20 snaps compared to K1.
Size 14 & 16 compatibility Compatible. Does a superior job of installing size 14 & 16 snaps compared to K2. Compatible.
Size 22 compatibility Compatible. Compatible.
Size 24 compatibility NOT compatible. Compatible.
Pronged stud (for double-sided snaps) compatibility Compatible. Compatible.
Butterfly, flower, heart, star compatibility Compatible. Butterfly, flower, and heart snaps use the same die as round size 20 snaps, but stars require the size 22 die. Compatible. All shapes use the same die as round size 20 snaps.


What are the differences between the 2 table-top press models, DK93 and DK98?
We now carry only the DK93 model as there are more limitations to the DK98.  We recommend the DK93 for its greater versatility, functionality, and value.  The DK93 does everything the DK98 can and more, at a more economical price.  

Dies are specific to each model, so you must always specify which model you have when purchasing dies.  We no longer carry most dies for DK98 but an adapter can be purchased that will allow you to use DK93 dies with your DK98 press.  Here are some of the differences between the DK-98 and DK-93.



~13 lbs. ~20 lbs.


Lower price due to lighter weight. Heavier weight translates to higher cost.
Handle Straight & long to provide better leverage to more easily press down.  Edges are less smooth so not as comfortable to grip.  Can be padded to provide more comfort. Curved so less leverage and slightly more difficult to press down hard enough. Can be extended to increase leverage. Smoother edges so more comfortable to grip.
Dies Top dies are twist-in so there are no small pieces to worry about losing. There are more dies on the market that fit this model, giving it more versatility to install a wider range of snaps, grommets, and potentially other products. Top dies are smooth and require an allen wrench and small screw to attach to press. Screw will strip over time and require replacing. Fewer die options so cannot install as wide a range of snaps. 
Fabric Clearance ~4" from die base to body of press to accommodate bigger projects and to allow snap installation farther from fabric edge. ~2 3/4" from die base to body of press, sufficient for most projects.
Wear & Tear Minimal wear & tear over time. The handle may need to be replaced periodically because of wear & tear at the point where it hits the vertical black bar.  Screws holding in the dies may eventually strip, requiring replacement.
Foot Kick Conversion Can be converted to foot kick press

Can be converted to foot kick press

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Can I use a tool I already own to install your snaps or other products?
Pliers: If you have hand pliers that can install size 20 plastic snaps, then most likely they will be compatible with size 20 KAM plastic snaps. Other sizes may not work so well.

Table press: Dimensions of our dies are provided here.  If these do not match what your press requires, our dies are not compatible unfortunately.  It is highly recommended that you purchase your machine, dies, and snaps from the same source to ensure compatibility.

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Intro to Snaps

What is a complete snap set?
A complete plastic snap set has 4 components: 2 caps, 1 stud (also called male), and 1 socket (also called female). Each cap is adhered to a stud/male or socket/female.  The socket and stud are what snap into each other, while the cap is what holds the socket and stud in your fabric. For a video intro to plastic snaps, click

Some styles of metal snaps have a post instead of a 2nd cap.  The cap is adhered to the socket, and the post is adhered to the stud.

A complete snap set means all 4 components noted above to make 1 complete set.   [Back to top.]


How are snaps attached to fabric?
The caps (and posts) have a long prong that stick out, while the sockets/females and studs/males each have a center hole.  The prong is poked through the fabric and then comes up through the center hole of a socket or stud.  A tool is then used (either a press or pliers) to flatten the prong. When the prong is flattened, it forms a pancake-like barrier which holds the socket or stud in place.

Cap prong poked through fabric

Socket or stud is placed over the fabric

Prong is flattened so that it forms a barrier to prevent the socket or stud from slipping through

Problems arise when the length of the prong is inappropriate for the fabric it is being used on.  If the prong is too short, it will not form a big enough barrier when flattened, which means the socket or stud will slide right off.  If the prong is too long, then the barrier formed when flattened will be too large and will prevent the socket and stud from clicking closed properly. [Back to top.]


What do the different sizes of snaps mean?
(Size and length recommendations are provided in the sections following this one below.)

It is industry standard to refer to snaps by “size" or "line" according to their cap diameter. However, this “size” does not correspond to any actual measurements.  For example, size 20 snaps have a cap diameter of 12.4mm. 

Please note the "size" standard pertains to the cap diameter only.  Actual measurements for sockets, studs, and posts may vary between brands and styles, which is why it is important to never mix brands or styles.

**Note that sizes 14 plastic sockets & studs are identical to size 16 studs and sockets--only the caps are different.

To convert mm to inches, please refer to this chart:

Plastic Snaps

Size Cap Diameter Standard Prong Length Long Prong Length Short Prong Length
14 9.74mm 3.5mm 5.0mm n/a
16 10.7mm 4.2mm 5.2mm, 6.2mm, 7.2mm n/a
20 12.4mm 5.6mm 6.2mm 4.6mm
22 14.1mm 7.0mm n/a n/a
24 14.8mm 7.5mm n/a n/a

Metal Snaps

Size Cap Diameter Prong Length
14 9.74mm 3mm
16 10.7mm 3mm
20 12.4mm 5mm & up
24 15mm 5mm & up

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What size snap should I use?

Most people start with size 20 plastic snaps. If you really have no idea or just want to experiment with different sizes, plastic snap size sampler packs of different sizes/lengths are available.

We are unable to provide specific snap recommendations due to the number of variables, such as your particular project, the fabric you are using, the number of layers you have, and your own personal preference. The following information is a general guide.  Please note, it is just a general guide and may not necessarily apply to every single case. In some cases, it may just be a matter of testing it out first:

- Size 20 (roughly 1/2" or 12.4mm cap diameter)

     Size 20 Standard Length is most commonly used for general applications, including baby diapers, regular clothing, and household projects.   This is the most popular size of plastic snaps and is a good size to start with for most projects.  Days for Girls menstrual pads are made with this size.

     Size 20 Long-Prong is necessary for very thick material like double layers of marine vinyl for key fobs, medium weight leather, and chinese prefold diapers. 

     Size 20 Short-Prong is good for thinner material where you still want a good, strong grip such as baby diapers made with just 1-2 layers of PUL.

- Size 16 (10.7mm cap diameter)

     Size 16 Standard Length is most commonly used for thinner, stretchy, or delicate material such as baby/toddler clothing, doll clothing, multiple layers of grosgrain ribbon, and anything intended for small children to snap/unsnap. Size 16 sockets and studs have a gentler grip compared to size 20 sockets and studs, but the grip is still very secure so any fabric prone to tearing should be reinforced with more durable material at the point where the snaps are installed.

     Size 16 Long-Prong is available in lengths ranging from 5.2mm - 7.2mm long for thicker material.

- Size 14 (9.7 mm cap diameter) is the smallest snap we have available.  They can be used for doll clothing and other projects where a small "footprint" is desired. Size 14 snaps have the identical socket and stud as size 16 so their grip is the same. Just the cap is smaller.

- Size 22 (14.1 mm cap diameter) is a larger snap and can be used in similar situations as size 20 long-prong.

- Size 24 (14.8 mm cap diameter) is our largest, strongest snap and should only be used in very heavy duty applications such as canvas tote bags, nylon webbing, dense leather and thick jackets. Because the grip is so strong, it can tear through more commonly used fabric.

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Do KAM snaps comply with CPSIA regulations?
KAM plastic snaps and metal snaps comply with CPSIA regulations.  Click
here for more information. [Back to top.]


What are KAM snaps made of?
KAM plastic snaps are made from polyacetal resin, a type of plastic that is stronger and more durable than other types of plastic.  KAM plastic snaps are BPA-free. Our metal snaps are made from copper with various finishes (ie. chromium, nickel, zinc, etc). [Back to top.]


Are plastic snaps as secure as metal snaps?  Do you recommend plastic snaps for baby/toddler clothing and diapers?
Yes, if attached properly, our plastic snaps are just as, if not even more secure than, metal snaps.  We recommend plastic snaps for baby/toddler clothing and diapers over metal snaps for a number of reasons:

 - Plastic snaps are more light-weight than metal snaps and will not weigh the clothing or diaper down.

 - Plastic snaps will not interfere with x-rays as metal snaps would. Our plastic snaps are commonly used on hospital gowns.

 - Some metal snaps, such as open-ring grip styles, have very sharp teeth, which means if they were to fall off due to improper attachment, they can pose a hazard to your child.

 - Plastic snaps will never rust and can endure repeated washing and drying.  That's one of the reasons why virtually every commercially made cloth diaper utilizes plastic snaps instead of metal.

 - Plastic snaps cool faster than metal snaps once out of the dryer, a benefit for little ones with sensitive skin.

 - KAM plastic snaps have been tested for harmful substances and comply with CPSIA safety regulations.

 - Some children are allergic to metal.

 - Plastic snaps are significantly cheaper than metal snaps.

 - There are considerably more color variations offered in plastic snaps compared to metal snaps. [Back to top.]


Can KAM plastic snaps be microwaved?
They can be microwaved but extreme heat may cause the snaps to expand slightly, which in turn may result in them not closing properly.  Some users do successfully microwave the snaps, but we recommend testing yourself under your specific conditions.  The factory recommends heat less than 40 degrees C (about 104 F).


* * * * * If you have questions not answered here, please send us an email and we'll be happy to answer them for you.  We also invite you to check out our Tutorials section, located on the top menu bar, where you'll not only find instructions for the presses and pliers but also tutes and templates for converting aplix on diapers to snaps, adding snaps to prefolds, making fabric-covered snaps, pacifier clips and lots more!

Please note the information on this page is copyrighted. You may copy any of the information but must provide a link back to this page. We appreciate your honesty :)