Tapered Countersink Drill Bit Set Woodworking Drilling Pilot Holes Depth Stop Collars Chamfer Counterbore Screw Hole Drill Tools

[Features]:

7Pcs set includes bits for drilling pilot holes for screw sizes 5#,6#,7# ,8#.9#,10# and 12# twist screws on the same axis, and screw nut below the board plane, drill collars can adjust up and down!

Apply to with a clamp or joint drilling machine, suitable for drilling in the hard wood and wood floor, machine screw for wood screw.

[Name]: 7Pcs carpentry countersink drill 5--12 # woodworking tools

[Material]: high speed steel drill bit 4241, the black part of it is 45 # steel.

[Package included]: 7x Countersink Drill Bits 1x Hex Shank