[Magnetic Bit Holding]Square bit socket set includes 1 4in 3 8in and 1 2in drive sizes for 1 4in hex bits. Magnetic bit socket helps hold insert bits in place during work. [Quick Bit Changes]Hex bit holder adapter design supports fast bit replacement and helps reduce bit drop while working. Suitable for use with a socket wrench or socket adapter in auto tasks. [Chrome Vanadium Steel]Made of steel for high hardness with and characteristics. Precision manufactured for consistent fit and repeated workshop use. [3 Piece Set With Box]Includes three drive tool adapters in common sizes plus a plastic storage. Easy to organize carry and store in garage toolbox or vehicle kit. [Universal Repair Use]Designed for insert bits and fits 1 4in hex bits. Suitable for mechanics technicians and users handling automotive maintenance assembly and general fastening jobs., Manufacturer: Pissente