Walnut Cutters Steel taper drill bits are used for drilling holes in wood or other hardwood floors and are suitable for bench drill bits, impact drill bits, chuck drill bits, etc. It is a must-have item for daily woodworking. Drill Set4pcs HSS constructed drill bits for drilling holes with screw sizes 5,6,8,10 and 12. Special DesignSpecial Steel Sleeve Cutters Designed or Counterbore Hole Quick Ventilation of ChipsThe Hexagonal Countersink Countersink Drill Bits includes a chip flute and a three-sided beveling machine that quickly discharges wood chips to achieve a smooth surface on any type of hardwood. Easy to UseHandle depth adjustable with hex key, drilling length can be adjusted for different length screws simply by loosening and tightening the set screw These tools pre-drill and countersink for screw head accommodation in one operation. Delivery in a wooden box. Security: The drill bits must be used on a drill. The machine's rotational speed should be between 1200 and 2000 rpm. Do not use on a router (too many rotations). Specification: Quantity: 6 Pieces Weight: About 100g Three Point Woodworking Drill Bit Diameter:5 , 6 , 8 , 10 , 12 Color : Money Objective: Drill holes in low hardness panels, such as wood, plastic, wood drill bits and other soft materials Package Included: 1 x 5mm Twist Drill Bit Set 1 x 6mm Twist Drill Bit Set of Twist Drills 1 x 8 mm Twist Drill Set 1 x 10 mm Twist Drill Set 1 x 12mm Twist Drill Bit Set 1 x Formal Knob