Uxcell 0.39 Hex Key Wrench L Shaped Long Arm CR-V Repairing Tool Heat-treated chrome vanadium alloy steel drop forged body provides long life durability. Nickel-plated finished improves the ability of wear-resistant for use in complex environments. The hexagon end is chamfered to slide easily into the fastener reducing wear on the wrench and fastener head. Long arm/short arm design to apply maximum torque in required applications. Widely used to drive internal hexagon socket screws found in furniture equipment and most general application.