Easy to use: This deburring external chamfering tool easily shaves down the outer edges of a flatted bolt. Simply attach it to a power drill, apply gentle pressure to the bolt head. Easy and quick fix for the nuts to be tightened. Improved carbide cutting edge: Razor compatible with sharp, maximum efficiency and durability. This demurring external chamfering tool features carbide cutting edge that provides better performance and longevity than counterparts made of materials such as high speed steel. Optimal compatibility: Hex shank with quick release design, fits most drills. Can be used to repair damaged/flatted bolts of virtually any material. Size: Fits 1/8' (3mm) to 3/4' (19mm). Operate with sufficient lubrication and less than 500 RPM. Easy to use: This deburring external chamfering tool easily shaves down the outer edges of a flatted bolt. Simply attach it to a power drill, apply gentle pressure to the bolt head. Easy and quick fix for the nuts to be tightened. Improved carbide cutting edge: Razor compatible with sharp, maximum efficiency and durability. This demurring external chamfering tool features carbide cutting edge that provides better performance and longevity than counterparts made of materials such as high speed steel. Optimal compatibility: Hex shank with quick release design, fits most drills. Can be used to repair damaged/flatted bolts of virtually any material. Size: Fits 1/8' (3mm) to 3/4' (19mm). Operate with sufficient lubrication and less than 500 RPM.