[Features]:
7Pcs set includes bits for drilling 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