Kat's 1160 300-Watt Magnum Handi-Heat Magnetic Heater Universal fit ideal for use on cars, light and heavy duty trucks, vans and SUVs Great for seasonal items like farm equipment, snowmobiles, motorcycles, snow blowers and chainsaws. For best results, place heater on the lowest flat surface of the bottom or side of the oil pan Applications include oil pan, engine block, battery holder or intake manifold May also be used for warming hydraulic systems or thawing frozen gutters, livestock feeders, locks, and pipes Heats approximately 20 square inches of surface area