QUANTITY: The eyelet tool set 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 USE: These durable tarp grommets are suitable for denim, canvas, tarpaulin, tents, awnings and other items made of fabric or other materials with a thickness of less than 1 mmEASY TO USE: Grommet eyelet kit makes installation easy. First use the hole punch tool to punch a hole in the tarpaulin (fabric), then take the eyelet set and finally attach the eyelet set with the attached tool . Please put a rubber pad or wooden board when drilling holes to prevent the puncher from becoming dull.HIGH QUALITY: Made of high quality cupronickel and electroplated surface, with a very good corrosion resistance and glossy appearance, does not rust easily.SIZE: Inner diameter: 12 mm (1/2 inch) and outer diameter: 21 mm (5/6 inch). With a plastic storage box, approx. 6.9 x 3.9 x 1.3 inch / 14 x 8 x 3.3 cm Grommet Grommet Kit, 12 mm Grommet Tool Kit Metal Grommet Sets 100 Set Grommet Kit 39;Grommet Eyelets for Sewing Canvas Tarpaulin Tent 12mm Eyelet Sets Grommet Kit Eyelets Tools Metal Grommet Eyelet Kit 100 sets of grommets, a black cutter, in a transparent storage box. The buttonholes are made of high quality metal. Durable buttonholes ideal for canvases, tarpaulins, tents, awnings, belts, clothing, wallets, bags and other fabrics. The inside diameter of these copper grommets is ;about 12mm (1/2'), outer diameter is 21mm (5/6'), height is 5mm (1/5'). How to use it? Drill the hole using a hole cutter-&gt;Push the grommet into the hole-&gt;Place it seal on the grommet-&gt;Fix it with a hammer. Tips Some parts of the product are sharper. Wear gloves and protect your hands during use FEATURES: Material: copper Color: silver Inner diameter: 12 mm (1/2 inch) < p>Outer diameter: 21 mm (5/6 inch) Quantity: 100 set PACKAGE INCLUDED : 100 sets of eyelets 1 x punch < p> 1 x base 1 x installation rod NOTE: Please do not drill holes in thick materials. Please use it carefully to avoid injury!