Features: brand new and high quality The 12 hardened steel needles on this needle for scaler work at a speed of 4000 RPM. Product Dimension: approx. 32cm/ 12.59 inches. To remove stubborn rust, dirt, paint and weld slag easily. The needle for scaler is constructed of carbon steel and is a great tool for cleaning off parts, tools, equipment and more. A great tool for welders, automotive specialists, do-it-yourselfers and hobbyists. Specifications: Material: Carbon Steel Product Dimension: approx. 32cm/ 12.59 inches Net Weight: 1220g/ 2.69 lbs No-load Speed: 4000rpm Air Consumption: 4.0cfm Inlet Connector: 1/4" Air Pressure: 90psi Stroke: 6-7mm Number of Punching Needles: 12 Needles Package Includes: 1PC Mini Pneumatic Removing Rust machine note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.