TANDY LEATHER FACTORY-Mini Punch Set. These strong and durable tempered steel tubes come in a variety of sizes (5/64in/2mm; 3/32in/2.5mm; 1/8in/3mm; 9/64in/3.5mm; 5/32in/4mm and 11/64in/5mm) and securely screw into the handle using the included wrench. Imported.