DB-C2 4pcs Carpentry Countersink Drill Bit Set

Specification: Material: HSS Drill 4241 Black chamfer drill body material: steel 45 Shank: 2.5mm dia Hex Shank Dimension: Model the corresponding bit size #6 2.5mm #10 3.15mm #13 3.65mm #16 4.5mm Features: Function: can drill the screw holes and keep on the same axis,after screw in screw, nut below the board! Apply to with a clamp or joint drilling machine, suitable for drilling in the hard wood and wood floor, machine screw for wood screws. Used for carpenters, cabinet , furniture makers and other woodworking trades.