Multi-function ratchet wrench for power tools 9-21mm socket set1、Premium chrome vanadium steel material, sturdy and durable, long service life. The inner steel columns are arranged with high hardness chrome vanadium steel, high bearing capacity. 2、It can dismantle all types of nuts and bolts in one time, compact size, easy to carry, also can be used with ratchet wrenches and pneumatic ratchet wrenches. 3、Perfect for automotive industry, household maintenance, manufacturing industry, carpentry, auto repair, construction and other industries. 4、Quick and easy to disassembly and assembly all kinds of screws, hooks, lag screws, and bolts heads etc. Self-adjusts to fit thousands of fasteners. 5、Removable screws, rotating hooks, disassemble flat head screw. Removing irregular screws and remove broken taps, tightening knobs. 6、A must have tool for both the professional and the average person, practical to use. 7、Universal socket wrench adapter attachment for power drills and ratchet wrenches that instantly adjusts to grip hex nuts, hooks, eye and lag screws, bolts heads, and other various shape and size objects.