The Workrite Banana Board Systems have a mouse platform that easily slides from side to side to accommodate left or right-handed mousing. The Workrite Banana Boards includes the low profile adjustable Pinnacle 2 Arm and easy glide ball bearing track. The Workrirte Banana Board Systems are fit with an EASY NO knob, NO Lever, Lift-N-Lock for one-touch height adjustment. This is one of our favorite keyboards. Order on-line today. FREE Shipping.