Machine tools and lathe accessories, namely, quick-change tool holders, both precision and qualified; pneumatic precision tools and structural parts therefore, namely, tool posts, boring bars, cut-off tools, chamfer cutters, machine stops, cradles for supporting tools, filtering cartridges for machines, stop rings, locking screws and pins, cut-off blades, threading blades, knurls, chip-breakers, shims, triangular inserts, profiling inserts, and replacement parts for the aforementioned items