Bluemoona 20 Sets - 5/8" 15mm Screw Studs & Stainless Caps Sockets Snaps Dot Fasteners Canopies Material:Stainless Steel Cap & Sockets 5/8" 15mm long screw studs Quantity: 20 Sets heavy duty, With Stainless Caps, Sockets Great for all canvas products - boat covers, awnings, tents, luggage, sporting goods