These are well-designed and versatile keyboard slides.
The base keyboard slide is available with either a Teflon® glide and track or a ball-bearing (BB) slide set. The length of both slides is 17-3/8", allowing 12" of arm travel in addition to 360° of rotation. A single adjustment knob provides control over both height and tilt simultaneously. The height can be adjusted over a 6" range, and the tilt can be set ±20° from horizontal.
The keyboard is securely held by rubberized pads in the spring-assist clamp, which holds keyboards 6" to 10" deep.
The optional wrist rest is also independently adjustable (using a single gyratory handle) in both height and tilt relative to the clamp, and features a gel-filled nylon fabric pad.
An optional 8" x 8" mouse pad can be mounted on the right or left of the keyboard; the pad tilt is controlled by a second gyratory handle. Choose the base model of slide and add whichever features you desire.
Well thought out, and sharply priced.