The ErgoWise® Corner Keyboard Tray can retrofit a 90-degree corner when used with a corner diagonal unit.
The Ultra-Thin Corner Keyboard Tray fits diagonal corners (17″ or 21″.) The Corner Keyboard Tray’s Mouse-forward design provides a convenient mousing area, while its wrist rest is removable to fit all types of ergonomic keyboards and its platform reverses for right or left-handed mousing.
You must choose an arm mechanism.