A 50mm hex screwdriver bit. High grade tool steel screwdriver bit, hardened for ultimate wear resistance. Metric sizes to suit KD furniture assembly. Dimensions: Overall length=50 mm Size A/F=3 mm for M4-M5 socket scw & M6 set scw Shank Diameter=1/4 hex Shank Diameter: 1/4 hex Diameter Metric: 3 Overall Length Metric: 50