-Four piece set includes bits for drilling pilot holes for screw sizes #6,#8,#10 and #12.
-Special designed steel counter sleeve countersinks or counter bores pilot hole.
-Adjustable counter sleeve depth with Allen wrench.
-Standard hex shank is quick change compatible.
-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.
Material: HSS Drill 4241
Black Chamfer Drill Body Material: Steel 45
6# 2.38mm (0.0937 inch) x 55mm(L)
8# 2.78mm (0.1094 inch) x 60mm(L)
10# 3.175mm (0.125 inch) x 63mm(L)
12# 3.56mm (0.14 inch) x 65mm(L)
Shank : 1/4 hex shank.
4 x Countersink Drill Bits
1 x Hex Shank