Versatile T-Track System for Woodworking. 36 Long Aluminum Extrusion, 2-Pk. (one) 36 inch 2-1/4 High multi-t-track for woodworking. (one) 36 inch 3 High multi-t-track for woodworking. Designed to accommodate major accessory fasteners. Each T-slot track is spaced 3/4″ apart and 3/4″ thick, ensuring a smooth and versatile woodworking experience. Experience the flexibility of customizing your …