The bosch oneclick locking screwdriver bit holder is a 1 4 hex shank bit holder designed for fast, one-handed bit changes in everyday screwdriving and drilling applications. The signature one-click chuck mechanism allows bits to be swapped quickly without putting the tool down, making it a practical choice for contractors and tradespeople working through repetitive fixing tasks. A built-in permanent magnet holds bits firmly in place during use, reducing the risk of drops and ensuring a secure, reliable connection throughout the job. With its 1 4 external hexagon shank, the holder is compatible with both three-jaw chucks and 1 4 internal hex tool holders, offering genuine versatility across a wide range of screwdrivers and drill drivers. It is well suited to general fixing work, site joinery, and installation tasks where quick bit access and a firm hold are essential. Features and benefits: one-click chuck function enables fast, one-handed bit changes permanent magnet provides a firm, secure grip on bits during use 1 4 external hex shank compatible with three-jaw chucks and 1 4 hex tool holders suitable for use with screwdrivers and drill drivers compact and lightweight at just 30g specifications: total length: 60mm shank: 1 4 external hexagon drive end: 1 4 diameter d1 : 14mm net weight: 0.030Kg