Genuine stainless steel covers, sockets, studs and posts will not rust or corrode even in salt water, durable and practical. Useful pressure kit, sturdy and high quality studs. Practical installation tools - The included punch tool and anvil can ensure 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 a cover which makes it beautiful; Leather rivets can be used for DIY or clothing, such as shoes, hats, jeans, windbreakers, down jackets, jackets, curtains, etc. Color: Silver Material: Stainless steel Size: Diameter: 15mm Package Contents: 90 Sets x Silver Snap Fasteners (72pcs) 5x Punching 5x 201 Convex Tool 5x 831 Convex Tool 5x Round Base Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.