The Max Arm has two 5/8" (16mm) hex shaped studs: a 3/8"-16 female thread and a 1/4"-20 female thread. This set includes an adapter spigot (KS-054) that helps convert the female threads on either end to 3/8"-16 or 1/4"-20 male thread. The adapters can mount most cameras & camcorders, AbleNet switches with universal mounting plates, or any other equipment that comes with a 1/4" and 3/8" male or female thread. The Max Arm allows you to easily adjust the position and angle of your mounted devices with ball jointed studs that rotate 360 degrees, and a cut-out in the sleeve surrounding the ball allows the stud to be bent 90 degrees. The central elbow rotates 360 degrees for infinite adjustability and is equipped with user-replaceable special friction discs with anti-slip rosettes to prevent unwanted movement. The large rubberized hand wheel slowly increases tension until all three joints lock simultaneously, making precise positioning a breeze. The other end of the arm has a ball head with a hex stud that connects to the Super Convi Clamp. The Clamp can be securely mounted onto most rails or tubes with external diameters from 0.2 to 2 inches (5-51 mm). The included plastic saddle can be attached to the Super Convi Clamp to securely hold onto tables between 0.2-1.2" (5-30 mm) thick. The user-friendly Clamp is easily secured and removed efficiently. This set mounts a camera, camcorder, AbleNet switch, or any equipment with a 1/4"-20 or 3/8"-16 male or female thread within a flexible 20" (53 cm) radius.