Material: Made of hard metal, high strength, high wear resistance, no hand injury, long service life and can guarantee long-term work. Burr removal: 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 bit to apply a small force to the nut and achieve the effect of grinding and deburring. Safety design: This cutting and drilling tool can protect your hands and will not cause sparks, so you can use it easily while 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 wire polishing. 2: Improve your work efficiency to a certain extent, ensure the quality of work and save the cost of replacing new parts. 3: Our product has two specifications of chamfer mounting, black triangle handle and black hexagonal handle Scope of delivery: 2 pieces Black triangle * 1 Black hexagonal with three slots * 1