this is a sort of drafting tool or has other uses...........if you found this listing...you know what those are.............related to drafting use on popular striplights........ includes both sectional and overhead drawings of the r-40,mr-16,par38,t-3,par 56,par 54, and far cyc................these are pretty much pre-owned not used.........minimal signs of use........just some scattered marks on the bottom side seen under magnification..............
