The Trailer Valet XL is the toughest, most compact trailer dolly on the market today that's designed to let you quickly maneuver your trailer into tight spots. The Trailer Valet XL moves most trailers up to 10,000 lbs. without extra assistance. A three-gear system makes cranking easy, and drill attachment makes it simple to attach most 18V cordless drills. Dual 9" tires that maximum traction can handle up to 500 lbs. per tire, and feature positraction technology that allows you to make tight turns. The automatic brake engages when the handle is released for superior safety, making it ideal for boat, RV, construction, and flat bed trailer use. Installs in minutes.