This is a great leather/fabric punch that has 6 different size options. Works perfect for punching leather for your spikes/screws or creating holes for belt buckles, fasteners and buttons.(For the application of studs, we suggest one of the Awls; this punch will make too big of a hole for attaching studs.) 9" long (22.5 cm) Hole Punch sizes: inch: 1/8 inch through 3/8 inch hole. metric: 2 mm through 5 mm hole.