1.5" x .75" Single Slot T-Slotted Aluminum Framing Extrusion - Alufab Inc.
Steel T-slot plate
POWERTEC 24 in. Heavy-Duty Aluminum T-Track Specialized T Slot Track for 3/8 in. Hex Bolt and T Bolts 1/4 in.-20 and 5/16 in.-18 71378 - The Home Depot
T Slot Aluminum Extrusion | T Slow Aluminum Framing | FlexMation
T-Slot Mill - DATRON CNC Milling Tools
POWERTEC 48 in. Heavy-Duty Aluminum T-Track Specialized T Slot Track for 3/8 in. Hex Bolt and T Bolts 1/4 in.-20 and 5/16 in.-18 71379 - The Home Depot