A cutting tool insert, particularly useful for machining of cast iron, comprising a body of a hard alloy of cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel a hard and wear resistant coating; and at least (Al,Cr)2O3 layer applied to said body is disclosed. Methods of making a cutting tool insert are also disclosed. In addition, methods for machining of cast iron using the cutting tool inserts are disclosed.