IMORDEN Toptable Slider Dolly Car Skater Rail Track + 7"articulating Magic Arm Precise Design, allows universal mounting options Adjustable aluminum axles of dolly car skater can be locked in place Durable material, super steady and firm There are 3 1/4" holes on the dolly car plate,which makes you able to install your camera forward, middle, or backward This articulating magic arm can adjust any on-camera lightings and other accessories. It provides shake-free stability and support to cameras while shooting