USW 12/3 Twist to Lock Multi Outlet Adapter 3-ft 12 / 3-Prong Indoor/Outdoor Sjtw Heavy Duty General Extension Cord in the Extension Cords department at Lowes.com
Century Wire and Cable 12/3 AWG SJTW Pro Lock D144120100GN B&H
6ft Waterproof Outdoor Extension Cord 12/3 SJTW Heavy Duty Power Black - BN-LINK
25 ft. x 12/3 Gauge Multiple Outlet Extension Cord with Indicator Light, Yellow/Black
25 Ft Lighted Extension Cord - 12/3 SJTW Heavy Duty Red Outdoor Extens - iron forge tools