Adjustable Hexagonal Shank Countersink Drill Taper Hole Drill Screw Step Drill Self-Tapping Screw Alloy Using for hand making a drawer or other woodworking. Industrial quality router bits. Solid hardened steel bodies with anti design. Build-up & heat coating. Hook & Shear Angles: High hook & shear angles allow Use: for wood, aluminum alloy screw countersunk hole, opening hole Cutters to slice smoothly into stock producing clean, splinter free. Note:1/4 shank and 1/2 shank are mainly used in the , Britain, France and other European and American countries, 6mm shank, 8mm shank, 12mm shank are mainly used in Russia, Germany, Spain, Pakistan and other countries. Note:Accessory styles and colors are sent randomly and cannot be specified. Colour:Gold Material:Tungsten steel Package Contents: 1 set * Hexagonal shank countersink drill 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.