Real stainless steel covers, sockets, studs and posts- not rust or corrode even in salt water, and practical. Useful snap kit,Heavy duty and high quality studs. Practical installation tools-the included punch tool and anvil can quick and easy installation even if you are a novice. The convex of the cap device is 201, and the convex of the column device is 831. Application-Both sides of the rivet have a cover that makes it look good; these leather rivets can be used for DIY crafts or clothing, such as shoes, hats, jeans, windbreakers, down jackets, jackets, curtains, etc. colour:Silver material:stainless steel size:Diameter: 15mm<br><br> Package Contents: 18 sets x silver snaps (72 pcs) 1x punching 1x 201 convex tool 1x 831 convex tool 1x round base Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.