Threading and grooving toolmaker Tool-Flo Manufacturing, Houston, has added polycrystalline diamond (PCD) and polycrystalline cubic boron nitride (PCBN) tools to its product line. The ultrahard materials allow for longer tool life when cutting abrasive materials such as graphite, hard rubber, plastics, carbon, fiberglass components, ceramics, wood, copper, bronze, brass and aluminum alloys, and permit higher removal rates and faster cycle times.