The big max lite max iii is an ultra light foldable push trolley featuring a third wheel for added stability all the wheels have steel ball bearings the third one is detachable and has a pressure lock system the trolley has an adjustable sort grip suitable for users of all heights and a push onpush off brake system there is also a high strength bag bracket a rear support bracket and a quick release velcro bag strap to keep your bag stable and secure additionally the trolley has a sco