These 1 1/8" wide extruded aluminum axes tracks come in 12", 24", or 48" lengths and are mitered at both ends. They can also be cut  to any length that will satisfy your job requirements. A set of four 48" tracks are included with the Large Ellipse Package, but they can also be purchased separately. They are pre-drilled and counter-sunk for screw attachment to your work surface or temporary sub-strate.