Wera IMP R SB Impaktor Holder with Retaining Ring & Ring Magnet is designed to absorb extreme impulse peaks with its special double-torsion spring, ensuring durability and reliability during use. This innovative Impaktor holder securely holds long and heavy screws, allowing for rapid and dependable positioning, which is especially useful for overhead work. The ring magnet can be easily removed from the screwdriving zone when working with metal to avoid unwanted magnetism. Primarily intended for manual power tool applications, it is compatible with bits featuring a 1/4" hexagon head drive according to DIN ISO 1173-C 6.3, and fits power screwdrivers with 1/4" hexagon drive per DIN ISO 1173-F 6.3. This holder is particularly suitable for use with common impact drivers, making it a versatile and essential tool for various fastening tasks.