"This M size (6") 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. The other end of the arm has a ball head with a hex stud that connects to the Magic Suction Cup. The ball heads on either end of the arm allows users to freely adjust the angle of mounted AAC switches and can be locked into position by tightening the central knob. This 6" suction cup provides a strong but removable grip on most flat nonporous surfaces, such as glass and metal. To attach the suction cup, pump the plunger until the red line is hidden. To remove the suction cup, simply pull the rubber tab at the edge of the suction cup to break the vacuum. The user-friendly suction cup is easily secured and removed efficiently from any nonporous flat surface. This set is an ideal solution to temporarily mounting an AbleNet switch or any equipment with 1/4"-20 male thread within a flexible 6" (15.2 cm) radius to a nonporous flat surface.
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.