Timber Tuff's TMD-800C2 Dual Adjust Trailer Dolly with Caster is one of a kind with its patented dual-adjustment design, allowing you to adjust the ball up and down AND forwards and backwards. This makes it uniquely adaptable to a wide range of trailers. It adjusts up and down 16.5" to 21" and forwards and backwards with 4 adjustments in 1" increments each. Solid steel frame with hammer-tone, powder-coat finish 800-lb. capacity Two 12" flat-free tires and one 8" swivel caster for easy maneuverability Patented dual adjustment moves the ball up and down, forward and backward 4 adjustments in 1" increments 2" hitch ball works with 2" coupler or larger 26" wheel base Height adjustable from 16.5" to 21" Perfect for heavy trailers and tandem trailers Order today!