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 10mm / 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.