-Four piece set includes bits for drilling pilot holes for screw sizes 3mm, 4mm, 5mm, 6mm.
-Special designed steel counter sleeve countersinks or counter bores pilot hole.
-Adjustable counter sleeve depth with 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.
-Chamfer is 5 flutes,In the process of using, can discharge the wood more rapid, sink hole disposable drilled smooth, screw cap perfect embedded in the surface of workpiece.
Material: HSS Drill 4241
Black chamfer drill body material: steel #45
3mm x 60mm(L)
4mm x 75mm(L)
5mm x 85mm(L)
6mm x 93mm(L)
Dia. of Chamfer: 15.8mm
Shank: 1/4 hex shank.
4 x Woodworking chamfer
1 x Hex Shank