Gardner Bender LNW-500 Locknut Wrench, &frac12; Inch., Loosen / Tighten Locknuts, Innovative Steel Construction fits UL Locknuts, Black Locknut wrench solves the problem of tight spaces and fits the majority of UL locknuts Etched markings allow for easy identification; clearly marked tighten and loosen ends make usage a breeze Thin design allows easy maneuvering in tight locations while durable steel construction makes it strong enough to get the job done Hooked tip latches onto locknut and maximizes turning leverage Durable lightweight tool fits easily in a pocket