Yellow Jacket 15 Amp 12/3 SJTW LockJaw extension cords are designed to keep tools plugged in. More flexible and abrasion resistant at any temperature than standard vinyl compounds. The durable jacket prevents breaking so you can get the job done in the toughest conditions. The heavy-duty, locking ends eliminate the frustration of tools coming unplugged. The reinforced blades help prevent accidental bending or breaking resulting in longer cord life. Solid molded power head stands up to heat, cold and rough use on the job site. Recommended for use with heavy duty equipment and tools. UL Listed product.