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Comparison : Item # 463R0.5BI40, 0.5 Millimeter (mm) Dimension e BI40 Aluminum Titanium (Carbon) Nitride (AlTi(C)N) Back Turning Insert with Chip Breaker
Item # 463R0.5BI90, 0.5 Millimeter (mm) Dimension e BI90 Aluminum Titanium Nitride (AlTiN) Back Turning Insert with Chip Breaker