Gardner Bender designed the innovative locknut wrench to end frustration. Specifically developed for tightening and loosening locknuts, this wrench features a thin profile that makes those normally tight spaces a thing of the past. It can be used to loosen or tighten a locknut by rotating the wrench in the direction of the arrows clearly etched into both ends of its sturdy steel construction. A specialty hooked tip latches onto the locknut and maximizes turning leverage. The GB Locknut Wrench is a reliable and durable addition to any tool box and with three sizes available you can rest assured that you have the size needed to fit the majority of UL locknuts you will encounter.