Konova Camera Slider Dolly K7 120cm (47.2 Inch) Track Aluminum solid rail roller bearing for smooth slide for Camera, Gopro, Mobile Phone, DSLR, ENG Payloads up to 77bs (35kg) with Bag Supports various accessories for parallax shot, motorized system and flywheel. Wider rail and 3 big bearings support heavier payload for heavy camera system like Arri Alexa, RED Weapon. Multiple 1/4" and 3/8" screw holes on both ends and middle for various mounting options. Two chrome coated shafts in the rail for rust protection and make slider more smooth with 3 big roller bearings. Removable and foldable legs allow the slider to be put in an included carrier for portability.