Brand New 4pack Double Cut T-Track for Woodworking Box contents: 4x 12" Aluminum T-Tracks Black SeekLiny is specialized in T-Track for Woodworking Black/Black/Red/Silver and T-Track Intersections, 2020/2040/4040/4080 Aluminum Extrusions&Hardwares. Find more from Seekliny. This 12 inch T-Track for Woodworking is double cut, pre-drilled, made of 6063 aluminum alloy and well anodized. Universal Aluminum T-Track for woodworking, designed to fit for 5/16” and 1/4” t-bolts, and 1/4” hex bolts About this 12" T-Track woodworking, Please refer to picture for size details.