Here's how the ergonomic K-Board works. Keep in mind that these can be used
to support a keyboard arm or a mouse pad or track ball or ... pretty
much anything.
Also note that there are actually 3 different widths available ( 6 3/8" - shown
below, 21 1/4" and 26 1/4" wide). This combination can
handle any size keyboard arms that you may have.
Keyboard/mouse
pad mechanism has a dual locking feature which assures stability.
Height adjustable keyboard arms that give ergonomic benefits.