Hardwood drill bit, HSS-M2, with adjustable counterbore and countersink, ball-bearing counterbore stops rotating when it grounds, preventing marking of the wood, 1/4" hexagon shank to ISO 1173, E 6.3, for Bangkirai, hardwood, softwood, ideal for pre-drilling of hardwoods when working on decking or garden furniture, with perfect bore and countersink depth on every fixing.