4pcs 1/4 inch Hex Shank HSS Countersink Drill Bit Set

Features:

100% brand new and high quality.

4Pcs set includes bits for drilling pilot holes for screw sizes #6,#10,#13 ,#16.

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.

Material: HSS Drill 4241.

Black chamfer drill body material: steel 45.

Shank: 2.5mm diam hex shank.

Model/The corresponding bit diameter size:

#6: 3mm

#10: 3.5mm

#13: 4mm

#16: 4.5mm

Package includes:

4 x drill bits

1 x wrench