The T28923 Papa Bear version of the Bear Crawl mobile bases was designed to fit larger machines. These mobile bases adjusts from 19 in. x 26 in. to 29-1/2 in. x 34-1/2 in. and have a 1200 lbs. capacity. Adding the Papa Bear under your machine will help you easily move equipment around your shop without assistance. This freedom allows you arrange your shop based on your project needs. Easy float, toe-flip lifting levers allow for quick movement and secure parking of your machine. Swivel and fixed casters offer amazing range of movement in any direction, allowing you to easily maneuver your new machine around in even the smallest shop. With solid steel, easily adjustable bars and reinforced, welded caster posts, have confidence of the structural integrity to move your machines around for many years to come. Minimum inside dimensions 19 in. x 26 in. Maximum inside dimensions 29-1/2 in. x 34-1/2 in. Maximum weight capacity 1200 lbs. Approximate shipping weight 38 lbs. Heavy-duty rubber/steel casters with sealed bearings Reinforced/welded caster posts Adjustable steel bars Easy assembly Powder coated finish to protect against the elements Adjustable positive stop/rubber leveling feet 2 fixed casters and 2 swivel casters Easy-float toe-flip-lifting levers Corner-tight engagement bolts.