The wera 890 4 1 universal bit holder is a 1 4 hex bit holder designed to accept standard screwdriver bits with a 1 4 hexagon head drive conforming to din iso 1173-c 6.3. Built for use with power screwdrivers, the holder features a retaining ring that locks bits securely in place during use, reducing the risk of bits slipping or disengaging mid-task. The 1 4 hexagonal shank conforms to din iso 1173-f 6.3, Making it compatible with a wide range of power screwdrivers and impact drivers that accept this standard connection. At 57mm in length, this is a practical everyday holder suited to electricians, joiners, and general contractors working with power-driven fastening tasks. It forms part of wera's connecting series 1 range, ensuring consistent compatibility across the wera bit and holder system. Features and benefits: universal compatibility with 1 4 hex drive bits to din iso 1173-c 6.3 Retaining ring secures bits firmly in the holder during use 1 4 hexagonal shank to din iso 1173-f 6.3 For broad power screwdriver compatibility part of wera connecting series 1 for consistent system compatibility contents: 890 4 1 universal bit holder, 1 4 x 57mm specifications: drive size: 1 4 hexagon length: 57mm drive standard: din iso 1173-f 6.3 Bit fitting standard: din iso 1173-c 6.3