The Makita TW0250 1/2in Impact Wrench has an aluminium hammer casing that offers high-durability and a compact body size, only 251mm (9-7/8in). It is fitted with an ergonomic, palm-fitting soft grip. The tool offers variable speed, and has a reversible function. Specification Input Power: 500W No Load Speed: 0-2,300/min. Impact Rate: 0-2,300/bpm Max. Torque: 250Nm Bolt Range: M10-M20, High Tensile Bolt: M10-M14 Weight: 2.2kg