7pcs 12mm Shank Lathe Boring Bar Turning Tool Holder Set with Carbide Inserts

Specifications: Material:42cr;  Wrench:T8.    Features: -Profiling bar for semi-finishing and finishing operations;  -Bar hardness approximately 45HRC;  -Good toughness and hardness, long service life;  -It can reduce the tool grinding cost and improve the cutting efficiency;  -Good low temperature impact toughness, improved the surface gloss of the cutting pieces.    Package Included: 7 x  Turning Tool Holders;  7 x  T8 Wrenches;  7 x  Inserts