Pramet SEMT Indexable Milling Insert. SEMT Indexable Milling Insert for use with S45SE09F high positive face milling cutters. A M8340 Grade Insert designed to offer a high cutting performance at a variety of cutting speeds.. High operational reliability Ideal for milling common steels and stainless steel Suitable for unstable cutting conditions Heat cracking resistance Can be used for dry machining without compromising tool life