4 Pcs set includes bits for drilling pilot holes for screw sizes #6,#10,#13 ,#16. 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 screw.
Specification: Material: HSS Drill 4241 Black chamfer drill body material: steel 45
Dimension: #6 the corresponding bit size: 2.5mm #10 the corresponding bit size: 3.15mm #13 the corresponding bit size: 3.65mm #16 the corresponding bit size: 4.5mm
Shank: 2.5mm dia hex shank.
Package Included: 4 x Drill Bits 1 x Hex Shank
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