An HSS annular cutter (rotabroach) with a 19.05mm Weldon shank — its ring of teeth cuts a slug out of the steel rather than grinding the whole hole away, so it drills large-diameter holes far faster and with less strain on a magnetic drill than a twist bit. Sold individually in imperial sizes so you can buy exactly the diameter and depth a job calls for.Key specs Material: HSS Cutting depth: 1" cutting depth Shank type: Weldon, 19.05mm shank Compatibility / fitmentFits magnetic drill presses with a 19.05mm Weldon or Universal shank arbor.Application / use caseSizes from 3/4" to 1 3/8" cover common bolt-hole and fixing clearances in imperial-spec steel sections, structural plate and flange work, with 1" depth cutters suited to standard plate thickness and 2" depth cutters for deeper penetrations through heavier box section or doubled-up material.
