Description
Heat treated tool steel countersink with a HSS drill. Adjustable for different length screws and can produce a 12.7mm (1/2 inch) diameter counterbored hole for woodplugs. The drill produce pilot holes only. D=1/2 inch D=12.7 mm D2=9/64 inch D2=3.5 mm Shank Diameter=1/4 inch hex Screw size S/W=No.12 H/W=No. 10
