1. Package Include Our grommet kit includes storage box, hole cutter, matching mandrel, base and 100 sets of grommets (each set includes 1 grommet and 1 washer). 2. Size of Grommet Kit Grommets inside hole diameter 12mm / 0.4 inch, flange outside diameter 16mm / 0.63 inch, and barrel length about 5mm / 0.2 inch. Storage box approx.17.5 x 9.8 x 2.2cm / 6.89 x 3.86 x 0.87inch. 3. High Quality Materials Our eyelet eyelets kit used for high quality brass material, they are very smooth, durable, very smooth, shiny, with good corrosion resistance and not easy to rust. 4. Easy to Use Our grommet kit includes a complete eyelet punch kit for easier installation. First use the punch tool to punch a hole on the tarpaulin, the non-slip provides more secure grip, then take the eyelet kit, finally use the attached tool to secure the eyelet kit securely. 5. Wide Usage Our grommet kit can provide an economical solution for repairing canvas, tarps, tents and swimming pool covers, good for shoes / laces, clothing, bags, crafts in leather. , pool covers, truck covers, sleeping bags, shower curtains, curtains and more.