Diverse combinations: grommet kit set includes a hole cutter, a matched mandrel and 100 sets of grommets (each set includes 1 and 1 washer), and a storage box Grommet tool kit: an economic solution for repairing canvas, tarps, tents and pool coverings, good for shoes/ shoelaces, clothing, crafts projects, etc. Easy to use: easy to set the grommets in place with the hole cutter and matched mandrel; The mandrel has a distinctive pattern on the surface, non-slip provides more grips size: 1/ 2 inch (12 mm) internal hole diameter, 4/ 5 inch outside flange diameter, and 1/ 5 inch barrel length With a plastic storage box: about 5.5 x 3.2 x 1.3 inch/ 14 x 8 x 3.3 cm, good for storing small grommet tool, easy to fetch and apply when you sewing Grommet Tool Kit, Grommet Setting Tool and 100 Sets Grommets with Storage Box (1/2 Inch Inside Diameter) are made of environmentally friendly brass, thickened. Great for your different leather decorations. Perfect for shirts, jeans, jackets, bags and other crafts. Not easy to deform, not easy to become dull, durable. Uses: home clothes repair, clothing spare, etc. Specifications: Colour: silver Material: metal Size: inner diameter 1.2cm Package Contents: 100 x 3 x tool Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.