Features: Fast and accurate to rust, and the maximum stud length of cleaning is 8cm/ 3. 15in. Internal wire brushes and removable washable sanding discs on the lower end for efficient removal of rust on the metal surface. This adjustment is very strong and easy to remove, and the disassembled disc can be rinsed with water. Suitable for 1/2 inches impact wrenches or electric drill. No need to change tools. Used for descaling of screws, bolts and other metal surfaces, great for home, automotive wheels, machinery, etc. Specifications: Material; Steel+Plastic Packing size: 14.8X5.8X 5.8cm Maximum stud length: 8cm Applicable screw length: 3-80mm Applicable screw diameter: 3-16mm Size: 14.5 x5cm Package Includes: 1x Stud Rust Removal Tool 2x Sanding Disc note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.