Comes in Handy Storage Case. Allows for longer reach for deep socket Allen-type screws. Also increases torque. Set includes 2 fractional hex keys .05" to 5/16". Heat-treated alloy steel. Also available individually. 42520 5/16" 42530 1/4" 42540 7/32" 42550 3/16" 42560 5/32" 42570 9/64" 42580 1/8' 42590 7/64" 42600 3/32" 42610 5/64" 42620 1/16" 42630 .05