Comes in Handy Storage Case. Allows for longer reach for deep socket Allen-type screws. Also increases torque. Set includes 9 metric hex keys 1.5mm to 10mm. Heat-treated alloy steel. Also available individually. 42660 10mm 42670 8mm 42680 6mm 42690 5mm 42700 4mm 42710 3mm 42720 2.5mm 42730 2mm 42740 1.5mm *42740 is 3 1/8" long