QUANTITY: The eyelet tool kit includes a hole punch, a matching mandrel, and 100 sets of eyelets (each set includes 1 eyelet and 1 washer) and a storage box. WIDE APPLICATION: These durable tarp eyelets are suitable for denim, canvas, tarpaulin, tents, awnings, and other fabric items or other materials with a thickness of less than 1 mm. EASY TO USE: The eyelet tool kit makes installation easier. First, use the hole punch tool to make a hole in the tarp (fabric), then take the eyelet set and finally fasten the eyelet set with the included tool. Place a rubber mat or a wooden board when making holes to prevent the hole punch from becoming dull. HIGH QUALITY: Made of high-quality copper-nickel and electroplated surface, with very good corrosion resistance and a bright appearance, not easy to rust. SIZE: Inner diameter: 12 mm (1/2 inch) and outer diameter: 21 mm (5/6 inch). With a plastic storage box, approx. 14 x 8 x 3.3 cm (6.9 x 3.9 x 1.3 inches). Eyelet tool kit, 12 mm Eyelet tool kit Metal tool Set Eyelets 100 Sets Eyelet tool kit for Tarpaulins Sewing Canvas Tarp Tent Eyelet set 12 mm Eyelet tool kit Eyelet tool Metal Eyelet tool kit Eyelet 100 sets of eyelets, a black cutter, in a transparent storage box. The buttonholes are made of high-quality metal. Durable buttonholes ideal for canvas, tarpaulins, tents, awnings, belts, clothes, wallets, bags, and other fabrics. The inner diameter of these copper eyelets is approximately 12 mm (1/2 \"), the outer diameter is 21 mm (5/6 \"), the height is 5 mm (1/5 \"). How to use it? Punch the hole with a hole cutter -> Push the eyelet into the hole -> Place the gasket on the eyelet -> Fasten it with a hammer. Tips Some parts of the product are sharper. Wear gloves and protect your hands during use SPECIFICATIONS: Material: Copper Color: Silver Inner diameter: 12 mm (1/2 \") Outer diameter: 21 mm (5/6 \") Quantity: 100 sets PACKAGE INCLUDED: 100 sets of eyelets 1 x punch 1 x base 1 x installation rod NOTE: Do not punch holes in thick materials. Use it carefully to avoid injury!