This Type 45 T-Track With Ruler is essential to building high-quality sliding jigs and fixtures for the router table, table saws, and band saws. The t-track with ruler allows you to quickly and easily clamp featherboards to your router table or table saw without any special clamping fixtures. The t-track with ruler is available with fixed and sliding scales ensuring it's wide application and user comfort. Features Material: aluminum alloy Good corrosion resistance Strong and durable Perfect for woodworking projects Length: 11-4/5" – 31-1/2"