MICRO 100, SAT-750-8, Stub ACME, solid carbide threading tool. Designed and engineered to specifically provide a coarse pitch with a shallow depth and that must be used to thread a work piece with considerations for mechanical and/or metallurgical applications. 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 an exclusive treating process that allows for increased speeds and feeds and extended tool life. For over 45 years, MICRO 100 is a known industry leader and internationally acclaimed.