This L size (9") Super Knuckle Arm has a ball head with 1/4"-20 female thread on one end that matches the universal mounting system of AbleNet switches. This arm is constructed by linking two S size arms with a 3" extension. The four ball heads of the arm allow users to adjust the mounted AAC switches to precise positions that suit their special needs. The extension arm has three 1/4"-20 and two 3/8"-16 female thread holes that allow for mounting devices using an additional Super Knuckle Arm. 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 an AbleNet switch or any equipment with 1/4"-20 male thread within a flexible 9" (22.8 cm) radius.
This set can also be used to create “homemade Velcro mounting board with ball head” (see the tutorial video on this page). Using this technique, all kinds of lightweight devices, such as AAC switches and joysticks, can be mounted via Velcro tapes onto a board. The user is then free to adjust the angle of the mount with the Super Knuckle Arm."
User Manual for KM-712