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 durability 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 standard impact and percussion wrenches. Impactor holder to absorb extreme impulse peaks. Special torsion effect due to double torsion spring. Equipped with a ring magnet for easy holding of long and heavy screws, making it ideal for overhead work. The magnet can be pushed back and turned off.