[Package includes] 240 pieces of 15mm snap fasteners, 4 parts for 1 set, a total of 60 sets, and 4 pieces of punching tools, a full set of installation tools, such a combination makes it easy to apply 【High quality materials】. Using 100% new marine grade high quality stainless steel snap, stable performance, glossy, beautiful appearance, not easy to rust, carbon steel punching tool high strength, hardness, can withstand punching force, so both can be stored for a long time 【Easy to use】. The included punching tool and anvil ensure quick and easy installation even if you are a novice. Large projection for cover unit, small projection for post unit 【Wide application】 Canvas fastener button screws are used in a wide variety of applications. Canvas button screws are widely used in canvas, tarpaulin, tents, awnings, clothing, leather, furniture, etc. It can be attached to the surface. Suitable for indoor or outdoor use. Perfect for DIY