Those snaps (ring spring) are very well for strong materials, strong fabrics or leather goods. Easy to use for materials up to 3.5mm (3/32 inch) of thickness.
Cap T 17mm / S 4mm / L 9mm / H 5mm
Socket T 14mm / S 11mm / L 4mm
Stud T 14mm / S 10mm / L 4mm
Eyelet T 14mm / S 4mm / L 7mm
For setting those snaps a tool is required.
For the snaps in this offer we recommend for presses and pliers a 4-part tool set (System 'F3') with the cap size of 17mm or a simple and reasonable hand setting die Line 24 and for punching the hole into the material a stamping tool in a size of 4mm.
The corresponding tools as well as a wide range of snaps in different materials (nickel included, nickel free), finishings, cap sizes, with ornaments, strength of fastener and unit packs you will find in the category Arts, Crafts & Sewing.