T Track has unlimited uses in the shop when making jigs and fixtures used on woodworking and metal working machines. This T track is precision extruded and is 3/8” thick and 3/4” wide. The inside groove will accept standard 1/4 inch hex bolts, 1/4 inch T bolts and 5/16 inch T bolts. Predrilled Countersunk Holes 3" from each end and then every 6". Screws not included.