Buy direct from THINBIT. LITTLEBIT STTD51E S Series, TiAlN Coated carbide threading insert for greater than 56 TPI (threads per inch). DURA-MAX 5000 carbide is a hard, abrasion resistant, sub-micron grain carbide with excellent edge and corner retention. This grade is recommended for cutting abrasive materials without an interrupted cut. TiAlN is a high performance PVD coating which excels in cutting abrasive or difficult-to-machine materials such as titanium, inconel, waspaloy, hastelloy, high nickel alloys and harder varieties of stainless steel. TiAlN performs well in high temperatures, interrupted cuts and dry machining. Kaiser Tool Company, Inc. makes all products in Fort Wayne, Indiana and has over 50 years producing THINBIT products. Our principles are Quality Products, Fast Delivery and Superior Customer Service. Please Note: Final shipping costs will be calculated at checkout based on value of all THINBIT items ordered. THINBIT, LITTLEBIT and DURA-MAX are registered trademarks exclusively licensed to Kaiser Tool Company, Inc. in the U.S. and/or other countries.