The versatile Quad Plus Dolly with Bazooka & 100mm Bowl Riser from Proaim supports up to 440 lb and features a 2 x 4' CNC aluminum platform, 10" rubber wheels, and a platform height of only 5.7" that is perfect for low-angle shots. This nimble dolly has a two-wheel steering system and can be used with the included rubber wheels or with skateboard wheels and track.
If you ever want to buy this dolly, please let me tell you that they don't make the extra accessories for it. Even though Proaim actually build the slots / holes for these accessories, but they don't manufacture them. I had to go to my local workshop to fabricate these extra parts, the side winds , so that when i needed to have more standing room on the dolly. I needed the two column push handle as it more rigid and stronger that the single column handle when pushing and stopping from a faster move. Also from my last review, the gave me a discount so that i can repair the off center screw stopper locally. Overall the dolly serves its purpose, it does the job well, the middle column is abit shaky at times so strapping it down is a must with Ratchet tie.