Made of material, sturdy and durable. These heavy duty snap fasteners can be attached to wood, plastic and fiberglass, they are strong and great for both indoor and outdoor use. Widely used for canvas, tarpaulins, tents, awnings, sailcloth, lawn furniture, and etc. Feature - Color: Black - Material: copper stainless steel. - Package Size: About 17.6x10x2.2cm/6.92x3.93x0.86inch - Can be attached to wood, plastic and fiberglass, they are strong and great for both indoor and outdoor use. - Suitable for repairing or replacing broken fasteners boat covers, boat canvas, tents, tarpaulins, sailcloth, umbrella, RV’s and more, fit for both the indoor or outdoor use. - With a storage box, easy to sort out and convenient to carry. - Made of material for lasting use. - of quantity greatly meets your requirements. Package list: 50 set x fasteners 2 x tools