Kreg's Precision Measuring Components allow you to turn your shop miter saw into a precise cutting system. Simply slide the cursor of the stop to the dimension you would like, place the board against the stop, and make repeated cuts that are exactly the same length. You build the support wings yourself out of plywood or particle board then add the track to the topside of the board. These perfectly sized components couldn't be simpler to install and use! Precision Measuring Systems Kit includes four 2' pieces of track, two self-adhesive tapes, flip stop and a production stop. USA.