Wera 05053872001 895/4/1 1/4'' Hex K Universal Quick-Release Bit Holders is for the take-up of bits with a " hexagon head drive as per DIN ISO 1173-C 6.3 and a quick-release chuck for rapid bit change. The strong permanent magnet holds the bits absolutely secure. Wera 895/4/1 1/4'' Hex K Universal Quick-Release Bit Holders are suitable for power screwdrivers with take-up as per DIN ISO 1173-F 6.3.