Universal: Unique design that automatically adjusts to any size or shape, grips hex nut, wing nuts, lag screws, hook, tension screw and bolt head, etc. Unscrew any bolt, nut and other fasteners that you don't have the right tool for. Multi-sided: high quality chrome vanadium forging, internally composed of 54 spring-loaded pins made of high carbon steel that shrinks to the shape of most objects. High hardness, durable, all for making anti-rust tools. Universal Socket Set: Professional quality universal ratchet socket set, comes with 3/8" power drill adapter. The way it installs with the wrench is more effective than a screwdriver for turning screws tighter. Replaces a toolbox full of tolls and so easy to use. ProfessionalProfessional grade universal socket fits standard 7mm to 19mm bolt heads, universal auto repair tools -adjustable. Can be used in automotive industry, home maintenance, manufacturing industry, construction. Size: approx. 5.3 x 2.5 cm. Color: silver Quantity: 1 set of 2