MAIN FEATURES HIGHLY EFFICIENT DESCALING Has internal wire brushes with removable sanding discs on the lower end for efficient removal of rust from metal surfaces and screws and bolts. When you want to sand a metal surface, an additional sanding disc attachment can be fitted. This fitting is very strong and easy to remove, and the dismantled disc can be rinsed off with water. HANDY RUST REMOVAL AID Fits to 1/2 impact wrenches or electric drill, which makes the cleaning fast and accurate. No need to change tools. Easy Step To Use WIDELY USED Designed for the descaling of screws, bolts and metal surfaces and is widely used in the home, engineering, automotive wheels, machinery, etc. SPECIFICATIONS Main Material: Steel, Nylon Color: Black+Red Maximum Stud Length: 8cm Applicable Screw Length: 5-80mm Applicable Screw Diameter: 7-15mm Weight: 140g Package Include: 1x Stud Rust Removal Tool, 2x Sanding Disc NOTE Due to manual measurements, please allow slight measurement deviations. Due to the different display and lighting effects, the actual color of the item may be slightly different from the color displayed in the picture. A gentle reminder: For better grinding of the bolts, please remove the bottom sanding disc to prevent the bottom from being sanded.