The TAB-4M Four-Mount Tripod Accessory Bar from Oben is a 23"-long aluminum tube with two 3/8"-16 side mounts and two adjustable locking top 1/4"-20 mounts. The accessory bar mounts to any compatible tripod with a 3/8"-16 screw to transform your tripod into a customizable working platform for attaching different accessories such as a tripod head for your camera along with a video light or studio light on the opposite end. The tube itself slides back-and-forth to reposition the attached accessories and locks down with its ratchet lever. The two top 1/4"-20 mounts lock down with their respective ratchet levers. With the two top mounts, you have the option of mounting a laptop platform for your computer, a microphone, an LED video light, or strobes along with countless video and photo accessories. Adapter bushings are included to accommodate gear with 3/8"-16 sockets. In all, this accessory bar is a versatile addition to your setup whether you're shooting in the studio or in the field.