TEKTON 25221 Long Arm Hex Key Wrench Set, Inch/Metric, 22-Piece [Older Model] Chrome vanadium steel wrenches are heat treated and black-oxide finished Precisely-sized, chamfered ends insert smoothly into fastener head, reducing wear Long arm wrenches provide extra reach and greater torque 13-pc. Long arm hex key wrenches (SAE): .05, 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8 in. 9-pc. Long arm hex key wrenches (Metric): 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10 mm