Upgrade 21pc 12mm Turning Tool Holder Lathe Boring Bar+Carbide Insert+Wrench Set

Description: Upgrade 21pcs 12mm Turning Tool Holder Lathe Boring Bar+Carbide Insert+Wrench Set     Specification:   Shank Diameter:12mm.  Material:Alloy steel.  Upgrade feature: Higher hadness.  Higher toughness.  Prevent processing vibration.  3-5 time longer service life.     Features: 1. Bar hardness approximately 50HRC, better than the old version. 2. Upgraded set can prevent processing vibration, higher hadness, higher toughness.  3. Longer service life, can work for you 3-5 times longer than old version.  4. Vacuum nitriding makes bar more durable.  5. Higher machining accuracy.  6. Great for semi-finishing and finishing operations.  7. Good low temperature impact toughness, improved the surface gloss of the cutting pieces.     Package Included: 7 x 12mm Turning tool holder.  7 x Carbide inserts.  7 x Wrenches