Features: Electric wrench extension rod is suitable for electric wrenches/rubber wrenches/air cannons. Can be used with multiple tools for convenience and speed: manual wrench, electric wrench, pneumatic wrench, time-saving and labor-saving, fast operation. Surfaces electroplating is not easy to rust: Chromium vanadium alloy steel, surfaces electroplating treatments, has strong rust prevention performances. Anti detachment steel ball design: interfaces anti detachment slot design to prevent detachment during operation. Anti slip design: polishing is not easy to rust, with strong torques. Specifications: Material:Chrome Vanadium Alloy Steel Length:Approx.75mm/3'',150mm/5'',250mm/10'' Package Includes: 3Pcs Socket Extension Set note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.