Can pair with manual wrenches, electric wrenches, and starter wrench tools, saving time and effort for quick Anti detachment steel design, interfaces anti detachment slot design to detachment during Chromium alloy steel, surfaces electroplating, has strong rust 1 / 2 inch specification, quick to tighten screws, and easy to operate extension rod Suitable for people who frequently use wrenches, such as mechanical maintenance workers, decoration workers, and automotive technicians, Manufacturer: Kaeltsyn