SWA Earthing LockNut is made of brass. EarthingNuts™ will change the way you terminate and earth metal cable glands forever. No extra drilling required – saving up to 60% on fitting time than conventional methods and does not compromise the enclosure IP rating. Improved safety during fitting and in service. Fitted right first time every time. Replaces the traditional “banjo” earth-tag and lock-nut. Unique cutting teeth bite into the box wall so that the gland can be tightened with one tool from the outside.