The Invincible Marine BR59212 800-Pound Trailer Jack swings from a vertical to horizontal position for a quick escape. The spring-loaded latch locks and releases the jack, moving it from vertical to horizontal. For optimal durability, this jack boasters corrosion resistant zinc plated tubing, and has a crank jack, poked wheel and a grease fitting. The swing-up jack has a convenient side wind handle with a versatile 6-inch diameter wheel made of polypropylene. This product fits tongues up to 3-inches by 5-inches, and provides 21-inches of lift and 10-inch for travel. Whether you"re outfitting your boat for the first time, or replacing well-worn nautical parts, this product is an essential accessory for your boating and domestic needs, and is perfect for nautical journeys and mechanical maintenance. Precision and reliability are the marks of quality that this product has proven time and time again, guaranteeing steadfast performance with each use. The Invincible Marine BR59212 800-Pound Trailer Jack comes with a 1-year limited warranty and protects against manufacturing and workmanship defects. Rugged, tough and reliable, Invincible Marine is well-known for their hardworking nautical line. For freshwater and saltwater boating, Invincible Marine designs products for avid fishermen and weekend boaters. Quality, utility and innovation go into every Invincible Marine product giving you more time on the water.