Bosch 2608522321 Impact Control Universal Bit Holder 60mm The Bosch 2608522321 is a highly robust impact control universal bit holder that is 60mm in length. It has a permanent magnet to secure the bit for optimum working and an extended torsion zone for extremely sturdy, long-lasting work. Features: The strong magnets keep your bit in place 1/4\" Hex Shank for maximum versatility Torsion zone absorbs impact force for extremely sturdy, long-lasting work Specification: Drive End: 1/4\" Length: 60mm