Easily adjustable and can be mounted in any position. This unique mounting system allows capability switch placement in virtually any position. The adjustable arm attaches to a table or wheelchair using a base clamp. Infinitely adjustable, the Magic Arm locks in place with a simple twist of a knob. Comes with threaded circular and rectangular plates which support capability switches. Fully extended, the arm length is 20½". The arm supports up to 5 lbs.