Neewer&reg; Professional Aluminum Alloy 400mm/15.7inch Extendable Adjustable Tripod Dolly with Rubber Wheels for DSLR Camera Camcorder Photography Photo Movie Film Video Making Quickly and easily transform your tripod to a easily moveable one,have sturdy and quiet shots while moving your tripod! Extendable dolly leg from 274mm/10.8" to 400mm/15.7", just adjust and lock! Tripod clamp knob fits most of tipod leg size. You can tuck the leg and put it in the included carrying bag for better storage and portability. Big handle for firm and confortable grip.