Incra TRACKSYS18 18 INCRA Track and INCRA Shop Stop Locate ANY cut on ANY machine EXACTLY where you want it The key is INCRA's patented sawtooth racks which position your work instantly and automatically in EXACT 1/32 inch steps with true machine shop precision without measuring INCRA Track attaches directly to just about any horizontal or vertical surface, so it will easily mount to all of your favorite tools A shop-made wooden sub fence slides directly onto the Track's front face to provide splinter-free zero clearance support for all of your cuts Now you can add INCRA's famous precision and repeatability to all of those one-of-a-kind shop-made jigs and fixtures that are so useful for specialty operations and production work