The Articulate 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 Articulated Arm has three 360 degree joints that allow you to easily adjust the position and angle of mounted camera or AAC switch. The joints are equipped with tooth patterns at the center to provide solid locking mechanisms. The hex studs on the end of the Articulated Arm can be connected to the Thick Table Clamp. The Clamp can be securely mounted onto tables up to 4" (10 cm) thick and provides excellent stability as a base. The user-friendly Clamp is easily secured and removed efficiently. This set mounts an AbleNet Switch or a camera within a flexible 22.5" (57 cm) radius of a thick table. Note: For mounting on tables thicker than 4" (10 cm), please check out the two other clamps we offer in the "Components and Accessories" section: KMB-601 (for table thickness < 9" or 24 cm) and KMB-601-L (for table thickness < 17" or 44 cm).