5pcs Countersink Drill Bit Counterbore for HSS Drill Woodworking Set Pilot Holes Screw Drilling #5 #6 #8 #10 #12

Four piece set includes bits for drilling pilot holes for screw sizes #5, #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

Specifications:

Color: As the pictures show

Material: HSS Drill 4241

Black chamfer drill body material: steel 45

Dimension:

5# 1.98mm(0.07795 inch)x 50mm(L)

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