FMT Long Arm Ball Hex Key Wrench Set, 26-pc, Inch/Metric &ndash; Gen 2 Heat treated chrome vanadium steel with black-oxide finish Precisely-sized, chamfered ends insert smoothly into fastener head, reducing wear Long arm wrenches provide extra reach and greater torque Ball hex ends allow up to a 25-degree entry angle to reach around obstructions 100% Lifetime Guarantee