Features and Benefits: * Power Drive metric hex impact quick change driver blades * 9 Piece 3" (75mm) and 9 Piece 6" (150mm) long * All popular metric drive sizes 2.5mm thru 10mm * S2 steel, the strongest hardest drivers available, heat treated to 58/62 RC * Limited Lifetime warranty New Metric Hex Power Drive set perfect for todays popular cordless Quick Change Impact drivers. This set includes all the popular Metric sizes from 2.5mm thru 10mm in 3" and 6" long blades.