Carmex Carbide Threading Insert - PG - TiAlN Coated - 21-18PGThe Carmex Carbide Threading Insert PG TiAlN Coated 21 18PG is a versatile carbide insert designed to handle a wide range of common thread profiles. Built for professional shops, it delivers reliable, repeatable threading performance with fewer tool changes. TiAlN coating: TiAlN coating boosts wear resistance and heat tolerance, helping edges stay sharper longer during high speed threading. Double edged design: The inserts are typically double sided,