Real stainless steel covers, sockets, studs, and posts will not rust or corrode even in salt water. Durable and practical. Useful snap kit with heavy-duty, high-quality studs. Practical installation tools the included punch tool and anvil ensure quick and easy installation, even for beginners. The convex surface of the cap tool is 201, and the convex surface of the stud tool is 831. Application both sides of the rivet have a cover for a clean appearance; these rivets can be used for DIY crafts or clothing, such as shoes, hats, jeans, windbreakers, down jackets, jackets, and curtains. Color: Silver. Material: Stainless steel. Size: Diameter: 15mm. Package Contents: 18 sets x silver snaps (72 pcs), 1 x punch tool, 1 x 201 convex tool, 1 x 831 convex tool, 1 x round base. Only the above package content is included; other products are not included. Note: Light and different displays may cause the color of the item in the picture to vary slightly from the real thing. The measurement allowed error is +/- 1-3cm.