Wera 05134480001 893/4/1 1/4'' Hex K Universal Bit Holders is for the take-up of bits with " hexagon head drive as per DIN ISO 1173-C 6.3 and has a stainless sleeve for special corrosion protection. Wera 893/4/1 1/4'' Hex K Universal Bit Holders is suitable for power screwdrivers with a take-up as per DIN ISO 1173-F 6.3.