Additional Details ------------------------------ Product description: Locking Devices, EdgeConnect Twist-Lock , Industrial, Female Connector Body, 20A 125/250V, 3-Pole 4-Wire Grounding, L14-20R, Screwless Terminal, Black and White EdgeConnect Screwless Termination system, simply insert the wire and press the plunger down. No tools are required. That connection is fool-proof and long lasting, to all but guarantee a high quality result. Any qualified installer regardless of level of training can guarantee a high quality result.