The Southpaw Extended 65% is a specialized keyboard designed for optimal workspace efficiency, featuring a left-hand number pad that allows for centered alphanumerics without pushing the mouse outward. It supports various layouts, including ISO and options for a left-handed arrow cluster and a macropad in place of the numpad. The keyboard is compatible with both Alps and MX key switches, with a focus on flexibility and customization. Complete kits start at $210.00 and include aluminum case options with adjustable risers. The design has undergone revisions for enhanced usability, including improved USB openings, support tabs, and rubber pad recesses.