The MICRO 100 DBM-140500 uncoated, coolant through, solid carbide boring bar. Designed and engineered for specifically for the Wohlhaupter MiniDigi Digital Precision Boring Heads. Featuring 8 mm shanks that require no reducer sleeve and top rake chip breaker. Tools can be utilized for both roughing and finishing. Manufactured with close tolerances to ensure ultimate precision and performance. Each tool's cutting edge/tip has a distinctive mirror like finish that significantly adds to material removal while improving surface finishes. MICRO 100 Solid Carbide Tools feature more than just a micro-grain of excellent quality their substrate is in a class of its own resulting from exclusive treating processes that allow for vastly increased speed and feed rates. For over 45 years, MICRO 100 is a known industry leader and internationally acclaimed when it comes to solid carbide tooling.