These dollies offer the ability to maneuver closely positioned heavy machinery in a multi-directional 360 axis, allowing loads to be moved in and out of confined spaces with ease. Multiple dollies can be used simultaneously under the machines support points for additional flexibility. Non-marking nylon swivel rollers are supported by heavy duty trunnion bearings for superior longevity. Textured rubber center padding provides additional gripping force. Durable steel construction has a scratch-resistant powder coat finish. note: when combining multiple machine dollies on a single load, the total load capacity is the combined capacity of each dolly.