Step drill with hardened cutting edges for furniture construction bolts.
Supplied with HSS slow spiral drill.
Used to stepped drill hole for Confirmat style screws for carcass assembly where a right angled joint is required.

Specification:
Shank Diameter=1/4 inch hex
Board thickness=15 mm min.
Bolt size=7 mm
D=5 mm
D2=7 mm
D3=10 mm