Features: brand new and high quality ●Extended for cross for triangle drill, precise drilling, wear-resistant, high-speed steel material. ●High-quality material selection, round handle diameter, strong and wear-resistant, and smooth chip removal. ●Suitable for punching of various materials, wood, soft gold, bowl, beeswax, PVC, plastic. ●Alloy material, using high-quality metal, taking into account durability and wear resistance. ●chip flute The surface of the chip flute is finely polished, and the surface is smooth and flat. Quick chip removal and smoother. Specifications: Material:Alloy Color ：Black Cutting diameter (mm): 5-12 Diameter of shank (mm): 6.35 Length of chip pocket (mm): 80-100 Total length (mm): 100-118 Useful length (mm): 80-100 Tool handle type: hexagonal handle Package Includes: 1 Set for Cross for Triangle Drill note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.