Manufactured from Alloy steel grade EN9, then hardened & precisely ground to sharpen the edges for deburring and maintaining the size accurately . Tapered reamers will help align holes, remove burrs from cut pipe, tubing, and Conduit, and enlarge and Countersink holes in sheet metal, plastic, and other materials T-handle design for easy turning and sure handling Quality Assured- Each tool is tested against industry standards for hardness, torque, finish, and usability