Item Type: Small Bore Boring Bar Material: High speed steel Length: 10L Specifications (optional): SHB-12-03, SHB-12-04, SHB-12-05, HB-12-06 Package List 1 x Small Bore Boring Bar Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. 1The surface is vacuum-nitrided processing, with higher hardness and more wear resistance 2High temperature quenching, greatly improve the hardness, wear resistance and toughness, and achieve bright surface and small deformation 3Made of high-speed steel, durable and long service life 4Suitable for various CNC turning and milling machines 5Available in four styles for choices: SHB-12-03, SHB-12-04, SHB-12-05, HB-12-06