"Designed to raise and lower A-frame trailers, the Elevate Outdoor Trailer Jack is constructed from durable steel with a rust-resistant coating and is designed to handle trailers that weigh up to 2,000 lbs. (including cargo). This trailer jack features a hand-operated crank and also comes with a drill adapter for use with any standard power drill. It has a range of 9"" to 23""H for a total travel distance of 14"". A pre-drilled mounting hole halfway up the shaft allows it to be permanently mounted directly to your trailer’s A-frame using three included mounting bolts."