Turning insert with TiB2-PVD coating over a very deformation-resistant unalloyed substrate. Designed for roughing, semi finishing and finishing of free machining aluminium, aluminium alloys and magnesium alloys. High hardness and extremely smooth surface resulting in reduced surface friction, speedy chip flow and outstanding wear resistance. Prevents built-up edge because of a very low affinity for aluminium. Screw-On inserts are the first choice for I.D. turning of all materials and O.D. turning on small to medium lathes. Available in ﬂat top and chip control geometries with both moulded and ground peripheries. Suitable for all workpiece materials.