Hollow Punch Set: Leather hole punch tool cuts holes in 6 sizes: 3/16" (4.8 mm), 1/4" (6.4 mm), 5/16" (7.9 mm), 3/8" (9.5 mm), 7/16" (11.1 mm), 1/2" (12.7 mm) for belts, watch bands and DIY projects Add Holes in Minutes: Attach this leather punch tool to a drill for clean, round holes with crisp edges. The hole punch for leather belts cuts smoothly without tearing, fraying, or rough finishes Cuts Multiple Materials: This gasket hole punch set takes on leather, dense rubber, plastic, and cardboard with carbon steel precision, and works as a fabric hole punch on canvas and denim Easy Drill Operation: This hole punch set chucks into any standard drill. Run the hollow drill bit at low speed, 300 to 500 RPM, with a wood backing board for clean cuts and longer life Versatile Leather Working Tools: Oil after use, sharpen with sandpaper. This leather belt hole punch tool doubles as a foam hole cutter for crafts, bookbinding, gaskets, and grommets