MICRO 100, RNC-250-230X, AlTiN - Aluminum Titanium Nitride coated, 90? included angle, double ended, solid carbide engraving tool. Designed and engineered with a standard conical v-shape for most common engraving and marking applications. Excellent for engraving applications in most materials. AlTiN coatings are high performance and versatile. Has a higher breakdown temperature while maintaining high surface hardness at elevated temperatures. This coating promotes tool life and allows for faster speeds and feeds. Applicable with oxidation temperatures up to 800? C to 1450? F. Best suited for alloys steels, stainless steels, tool steels, nickel alloys, titanium, and dry machining 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 processes that allow for increased speed and feed rates and extended tool life. For over 45 years, MICRO 100 is a known industry leader and internationally acclaimed.