This Line 20 Snaps consist of four components, a top cap, secured to the material with a socket, and a bottom stud, paired with an eyelet. The strong spring in the socket grips onto the groove in the stud to hold both sides firmly together. This is the quality hardware that you've been looking for. You can count on the consistent and perfect fitting every time! For use with 2.4mm~2.8mm (6/7oz) leather Set with snap setter, rawhide, poly mallet or hand press Cap: 13mm (1/2") Post: 5mm (3/16") Pack Size: 10pk, 100pk, 1000pk Related 8057-00 Line 20 Snap Setter 8108-10 Deluxe Snap Setter Set 3960-00 Craftplus® Multi-Purpose Leather Hand Press 3995-00 Craftplus® Hand Press Snap Setting Die, Line 20 Ivan branded tools are recommended when setting this hardware. How to set snaps, including selecting the right snap and hole punch size. What are the differences between press snaps?