Long Arm Ball End Hex Key Wrench Set 1.5 - 10mm. Set includes 9-piece long arm hex key wrenches: 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10 mm. Product Features Heat treated chrome-vanadium alloy steel Ball ends allow up to a 25 degree entry angle to reach around obstructions Hinged case opens flat Long arm wrenches provide extra reach and greater torque Sizes marked on case for fast size selection Set includes 9-piece long arm hex key wrenches: 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10 mm The longest key length 260mm