The present invention relates to a cutting tool insert having a substrate and a coating, the coating is composed of one or more layers of refractory compounds of which at least one layer includes a precipitation hardened (Ti.sub.yAl.sub.xMe.sub.1-x-y)N based layer, where Me is one of the elements: Zr, Hf, V, Nb, Ta, Cr, Mo, W or Si, and: x is between 0.50 and 0.80; the ratio, R=x/(x+y), is between 0.50 and 0.85; the sum of Ti and Al subscripts, S=x+y, is between 0.7 and 1.0; the ratio of the peak width, F.sub.10/90, (FW10% M or FW90% M meaning Full Width at 10% and 90% of the maximum peak value reduced with the background) measured on the 200 peak at approximately 43.degree.2.theta. (using Cu K.alpha. radiation) of the (Ti.sub.yAl.sub.xMe.sub.1-x-y)N coating, according to FIG. 4, is higher than 7.5; the ratio between the area of the h-AlN (100) peak at approximately 33.degree.2.theta. (=A(h-AlN).sub.100) and the c-(Ti.sub.yAl.sub.xMe.sub.1-x-y)N (200) peak at approximately 43.degree.2.theta. (=A(c-(Ti,Al,Me)N).sub.200) called K, i.e. K=A(h-AlN).sub.100/A(c-(Ti,Al,Me)N).sub.200 K is between 0 and 0.3; and the layer a single (Ti.sub.yAl.sub.xMe.sub.1-x-y)N (200) peak without several maxima.