Oka (3mm-5mm) 2 Prong Pointed Chisel Diamond Hole Punch for Leatherworking Leather Craft ToolsUse for making a hole on leather sheet for hand sewing. For making a more delicate handiwork. The whole tool is tempered so theres no bent or deformed tool. Black coating prevents rust. The tools blade is sharpened and ground on a one by one basis so theres no damage on the leather sheet when you pull off the punching tool from it. Knurling the body part makes it nonslip so as to get easier grip to work with. Made in Japan