S2 1/2X55XT45 Bluing Blister Sleeve

1、Extra-hard S2 alloy steel, blueing surface treatment, integrated forging, anti-rust and durable, hardness up to 58-60 2、Bit chamfer design, national standard star bit, possess high accuracy, not easy to slip 3、Made of S2 alloy steel material, come with large torsion, strong and durable 4、Overall heat treatment, hardness ±HRC58, durable for a long service life 5、Produced with excellent craftsmanship to bring smooth surface, which is beautiful and practical ​Item Type: Socket BitMaterial: S2 alloy steel Heat Treatment: Overall heat treatment, hardness ±HRC58 1 x Socket Bit