TEKTON 25219 Long Arm Ball Hex Key Wrench Set, SAE, 13-Piece Chrome vanadium steel wrenches are heat treated and black-oxide finished Ball hex ends allow up to a 25 degree entry angle to reach around obstructions Chamfered straight ends insert smoothly into fastener head, reducing wear Long arm wrenches provide extra reach and greater torque 13-pc. Long arm ball end hex key wrenches (SAE): 3/64, 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.