Cut grooves on both the inside and outside of a workpiece with the same insert. These inserts are compatible with top-notch style threading and grooving systems, which use a highly rigid clamping design, resulting in a smoother finish and superior tool life. When the edge on one face dulls, flip the insert over. Pair these inserts with a holder (sold separately) with a shank size that fits your machine and workpiece setup. Larger shanks are more stable, while smaller shanks fit into tighter spaces and allow for finer cuts.