Leviton 515AN 3W Straight Blade Grounding Plug, 1-Pack, White Triple-drive heady screws - Standard, Phillips, Robertson NEMA configuration number & rating molded on face of device for easy identification Deep-slotted, backed out terminal screws draw backwire clamps securely for maximum conductivity Husk & module keyed for easy alignment during wiring Built-in cord grip adjusts automatically for use with No. 18-3 through No. 12-3 cords