6Pcs/Set Carpentry Countersink Drill Bit Hex Shank Wood Tool

Description:
Special designed steel counter sleeve countersinks or counter bores pilot hole.
Adjustable counter sleeve depth with a wrench.
Drill and countersink for wood screws without changing bits.
Drilling length can be adjusted for various length screws simply by loosening and tightening the setscrew.
Countersink or counter bore clean, smooth holes for screws and fasteners.
For use in wood and plastic.
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: High Speed Steel Drill 4241
Black chamfer drill body material: steel 45
Size:
5# 1.98 mm (0.07795 inches) x 50 mm (length)
6#: 2.38 mm (0.0937 inch) x 55 mm (length)
8# 2.78 mm (0.1094 inch) x 60 mm (length)
10#: 3.175 mm (0.125 inch) x 63 mm (length)
12#: 3.56 mm (0.14 inch) x 65 mm (length)
Shank diameter: 1/4 hexagonal handle
Package included: (For use in wood and plastic)
5 x Drill Bits
1 x Hex Shank