More on Amazon.com : http://www.amazon.com/gp/product/B0033YIRVO?tag=thefatkidin06-20

Opteka M3 Professional Heavy Duty Folding Tripod Dolly with Case for Photo and Video Cameras

All metal ball bearing casters with SureGrip rubber wheels for super smooth roll
Heavy duty metal construction for professional tripods
One-step easy lock locking wheels
Universal fully adjustable leg locks
Easy folding design with carrying handle