¡¾Upgrade Version¡¿ 1. Come with a ring on the base, which helps to organize the wires. 2. Enhanced the thick of the base and the tube, which makes it more stronger to hold the camera or ring light. Selens Photography Studio Wall Mount, Camera Wall Ceiling Mount Boom Arm Up to 39",with 3/8" & 1/4" stud ¡ïThe wall mounting boom arm is made of high-quality metal with a sleek black finish, sturdy and corrosion-resistant ¡ïLength is extendable from 18 inches/45cm to 39 inches/100cm, that can be mount vertically or horizontally to meet your needs ¡ïWith 3/8" & 1/4" stud is perfect for mounting different equipment on wall and ceiling, like studio video strobe lights, monolights, flash, softboxes, soft umbrellas, etc ¡ïThe Base with 8 Holes Helping mount the boom arm on the wall and ceiling more solidly and securely ¡ïThe camera wall mount can be easily fixed on a solid wall or ceiling, helping to walk through in your studio, making the space feel bigger and clutter free Specification: Color: Black Material: Premium metal Net Weight: 2.26 pounds Folding Height: 18 inches / 45cm Opening Height: 39 inches / 100cm Package included: 1 x Ceiling Rod (Ceiling Stand) 1 x Adapter Screw (Convert Screw) 4 x Screws