Features: 1/2 inch specification, quick to tighten screws, and easy to operate extension rod. Anti detachment steel design, interfaces anti detachment slot design to prevent detachment during operation. Chromium vanadium alloy steel, surfaces electroplating treatments, has strong rust prevention performances Can pair with manual wrenches, electric wrenches, and starter wrench tools, saving time and effort for quick operation; Suitable for people who frequently use wrenches, such as mechanical maintenance workers, decoration workers, and automotive technicians. It can be widely used in fields such as home repair, car maintenance, and constructions to improve work efficiency. Specifications: Material: Chromium Vanadium Alloy Steel Specification：1/2 inch Size:approx 75mm/2.95in 125mm/ 4.92in 250mm/9.84in Quantity: 1PC Package Includes: 1PC Ratchet Wrench Extension Bars note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 1cm errors due to manual measurement.