These dies are compatible only with the K3 basic pliers. These pliers are engraved with "K3" on the top of the bottom handle and have a "K3" sticker on the storage ziplock pouch. *NOT* compatible with K1, K2 or any other models.
Quickly remove problem plastic snaps without damage to fabric. Fitted for size 20 snaps but works with other sizes with manual centering. See how it works.