This is a complete kit for your miter saw or radial arm saw into a precise cutting system. Also works with a drill press and more. Kit contains four 2' pieces of Top Trak, two 12' self adhesive tapes (L-R and R-L), one Swing Stop, and one Production Stop. Take the guesswork and your tape measure and pencil out of cutting wood to length. Kreg's Precision Trak & Stop Kit allows you to turn your shop miter saw into a precise cutting system. Simply slide the cursor of the stop to the dimension you'd like to cut, place the board against the stop, and cut to an exact length time after time. You build the support wings yourself out of plywood or particle board then add the trak to the topside of the board. Perfectly sized work pieces couldn't be simpler.