YELANGU L4X-BE YLG1817A 60cm Aluminum Alloy Splicing Slide Rail Track + 3-Wheel Video Pulley Rolling Dolly Car for SLR Cameras Video Cameras 1. CNC machining, surface anodizing 2. The product adds a buckle on the basis of the track, which can be installed on the trolley, which can effectively prevent the trolley from falling off the slide rail during operation, causing damage to the photographic equipment 3. The product slide rail pipeline is composed of three parts spliced, detachable, the length of the slide rail can be selected independently, and the effective stroke is 62cm. Easy to carry and easy to assemble 4. The product is equipped with an adapter screw, which can be adapted to a camera cart and can be connected to other camera equipment 5. There are adjusting nuts on the four feet of the slide rail, and the slide rail can be balanced by adjusting the nut 6. Both the tripod plate and the bottom connecting plate at both ends of the slide rail are provided with 14 and 38 threaded holes, which can be connected to other equipment