Made of , high-quality carbon steel, this drill bit set hexagonal handle is very strong and will last you many years of drilling requirements. These hex bit drill bit sets offer long-life sharpness and sturdiness. EFFICIENT LEATHER HOLE TOOL: These belt hole tool long hex shank bits feature a knurled body design for a secure grip, precision ground grooves and cutting edges. These hex bit extensions will provide you with easy storage and transportation. Easy-to-use little drill bit set: No need to press hard, it just glides through layers of leather, fabric and foam. Installing the grommets is now easier without excessive hammering. Use cardboard as a base so your hollow rolling pin punch retains its edge. Wide range of uses: This belt hole punch can be used to drill holes in cardboard, plastic, fabric, leather and other materials, making it versatile. Size and Packaging of Powerful Drill Bit Set: In our package, you will get 6 pieces hollow leather punch set in different sizes such as 5mm, 6mm, 8mm, 10mm, 11mm, 12mm. These Hollow Hole Punch Tool Sets. Material: carbon steel colour: Black Package Contents: 6 x Hex Drill Bit Set(5/6/8/10/11/12mm) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.