External Chamfering Deburring Drill Bit with Tungsten Carbide Blades Three strength tungsten carbide blades provide efficient cutting and longer life than speed steel. Safe and costeffective deburring tool for removing outer edges from a flatted bolt. Attach to a power drill and apply gentle pressure to the bolt head for an easy chamfer and smooth nut engagement. Precision fit: working diameters from 1/8 in to 3/4 in (320 mm). Detachable 1/4 in hex shank with quick release design, compatible with most drills including lithiumion, hand, and table drills. Wide application: suitable for thread trimming and bolt deburring, and also useful for repairing damaged bolts and tightening nuts. Compatible with a variety of materials including stainless steel, hardened steel, and wood. Practical use scenarios Metal fabrication: deburr and chamfer bolt heads to ensure smooth nut threading and reliable assembly. Bolt : restore and prep damaged bolt ends to reestablish threading and enable nut installation without replacement. Wood and metal projects: prepare bolt ends for quick, clean assembly in furniture, cabinets, or structural work where a precise chamfer is needed.