Grooving and turning insert with a CVD tri-phase coating on an extra-strong, cobalt-enriched alloyed substrate. Designed for heavy cutting of low, medium and high-carbon steel, medium hardness alloy and tool steel, stainless steel and some high-temperature alloys. Excellent thermal and mechanical shock resistance makes grade KC850 ideally suited for difficult drilling applications. Used in insert for Kendex/Metcut drill bodies.