Whether it is industrial production or family for personal use, are very useful woodworking tools, loved by friends A good solution to the carpentry deep hole processing problems The Sanjiao wood drill and twist drill the biggest difference is that its head has three sharp Easy to locate, will not be biased, high-speed cutting, The wood for the powder, mainly for processing holes. Specifications: 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, 12mm, length are 300mm. Weight: 509G Photo Color Material: High speed steel, quenched by heat treatment to improve hardness. Package Contents: 7 x Drill Bit Tool Only the above package content, other products are not included. Note: Light 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.