Robust bit-check from Wera. Bit-checks provide a quick overview of the available tools. Unused bits can simply be returned to the assortment, preventing loss. Easy to transport, for example, in a shirt pocket. Impact technology ensures above-average service life even under extreme conditions. Increased friction resistance due to a rough diamond particle coating on the bit tip prevents slipping out of the screw. Particularly suitable for use with commercially available impact and hammer drills. Impactor holder to absorb extreme impulse peaks. Special torsion effect due to double torsion spring. With a ring magnet for easy holding of long and heavy screws, ideal for overhead work as well. The magnet can be pushed back and thus turned off.