Walnut CuttersSteel 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 which Quickly discharges wood chips to achieve a smooth surface on any type of hardwood. Easy to UseAdjustable handle depth with hex wrench, drill length can be adjusted for different length screws simply by loosening and by tightening the adjustment screw These tools carry out in a single operation pilot holes and countersinking for the housing of the screw heads. Delivery in a wooden cassette. Safety: Drill bits must be used on a drill. The speed of the machine should be between 1200 and 2000 rpm. Do not use on a router (too many rotations). Specification: Quantity: 6 Pieces Three Point Woodworking Drill Bit Diameter:5 , 6 , 8 , 10 , 12 Color: Money Purpose: Drill holes in low hardness panels, such as wood, plastic, wood drill bits and other soft materials Package Included: