An assortment of various steel threaded inserts, plug taps, and insert tools from Hillman. This assortment includes metric threaded inserts, as well as all insert tools and plug taps needed to create thread holes and fix inserts into place. These parts are ideal for adding a strong, secure screw thread to soft or thin material. The contents of this assortment feature metric coarse screw thread sizes in M6, M8, and M10 varieties. Full assortments of #59156 contain nine (9) refills comprised of Hillman Item #'s 59157-59165.