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
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Hyper Tough 15FT 16AWG 3 Prong White Outdoor/Indoor Use Single Outlet Extension Cord - Walmart.com
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Flat 3-Outlet Extension Cord 10 Ft for Indoor Use by Bindmaster- UL-Listed 3-Prong Multi Extension Wire- Space-Saving Flat Angled Extension Cord - Amazon.com