WMTC015L05CM08-M433B aka 3543063, 583-167-48,583167 M433B Widia /Manchester 1.5mm width of cut x .005″corner radius cutoff insert, 5 DEG LH LEAD M433B GRADE  Insert for WMTC system is size 1 . This insert has a parallel edge design to give you better surface finishes in Stainless Steel, Titanium, and other exotic materials.