This AC WORKS brand heavy‑duty wiring device set includes both a NEMA L6‑20P 20‑amp 250‑volt locking male plug and a NEMA L6‑20R 20‑amp 250‑volt locking female connector. Designed for industrial, commercial, and high‑power residential applications, these devices provide a secure and durable connection point for equipment requiring a locking configuration.Each component is built with impact‑resistant, chemical‑resistant, and weather‑resistant construction, and features a weather‑tight seal plus a strain‑relief structure compatible with SJT, SJO, SOO, STW 12/3, 10/3, or 8/3 cable specifications. The locking mechanism ensures devices remain securely connected during operation.These wiring devices are UL and cULus listed and engineered with thick copper prongs and terminals for dependable electrical contact.DIY products include a 1‑year limited warranty. Material: Thermoplastic.