drill bits & sets
irwin speedbor 585 87914 7 8 inchx4 inch speedbor drill bit
patented micro groove cutting edge and spurs produce a smoother hole finish double spur design scribes the hole before the chips are made producing a cleaner hole and reducing vibration shorter bit length gets into confined spaces between studs where standard lengths will not fit all bits have a 1 4 hex shank that fits all drills and 1 4 quick change adapters sku orsno42755
irwin speedbor