Material: Made of hard metal, high strength, high wear resistance, no hand injury, long service life, and can guarantee long-term work. Deburring: This product can quickly remove rusty screw burrs, and the nut can be easily opened or tightened without replacing expensive screws. Function: It can connect the external deburring bevel to the electric hand drill, which is the best choice for processing copper, iron and stainless steel. Easy to use: use the lowest speed of the drill to apply a little force to the nut and achieve the effect of grinding and deburring. Safety Design: This cutting and drilling tool can protect your hands and won’t cause sparks, so you can use it easily while you are working. Product specifications: Material: hard metal Color: black Length: 50 (mm) Size: inner ring diameter 22mm, outer ring diameter 28mm description: 1: The external chamfering device is suitable for various drills. It can easily remove burrs without hurting your hands. It can be with or without