This variant of the wera 840 1 impaktor hexagon screwdriver bit is supplied in a 4mm hex size at 50mm length, available as a pack of 5. The 50mm length makes this bit well suited to deeper or harder-to-reach fastening tasks where a standard short bit simply won't reach. Wera's impaktor technology ensures these bits can handle the high-impact forces generated by modern impact drivers, delivering an exceptional service life even under continuous heavy use. The diamond-particle coating on the tip bites firmly into the screw head, eliminating slippage, while the hex-plus profile increases contact area to reduce the risk of fastener damage. Compatible with holders per din iso 1173-f 6.3, These bits feature a 1 4 hexagon drive and include wera's colour coding system for effortless identification on site. Features and benefits: impaktor technology for above-average service life under extreme conditions diamond-particle coating prevents slipping and cam-out hex-plus profile reduces notching and screw head damage suitable for use with standard impact drivers 1 4 hexagon drive wera connecting series 4 colour coding for quick profile and size identification specifications: hex size: 4mm length: 50mm drive: 1 4 hexagon din standard: din iso 1173-f 6.3 Contents: 5x 840 4 imp dc impaktor bits: 4mm x 50mm