Incra TTRACKPLUS24 24-Inch T-Track Plus, Imperial Scale General purpose aluminum T-Track Use on jigs, fixtures, work benches, drill presses, router tables, sliding platforms, fences, etc. T-Slot captures standard 1/4" nut or 1/4" bolt head. Includes #8 wood screws for mounting to any application T-Track PLUS includes a sliding scale that can be "zeroed" to any reference position.