LHY整体直柄直槽丝锥● 特性：性价比高 高精度修复螺纹 轴承钢材质 锋利耐用 锁定立强 规格齐全 精工制作 高效率 使用广泛 扭矩高 整体热处理 高硬度 耐磨损 切削轻快 阻力小容屑空间大 实用性高 强度和韧性配合好 螺纹清晰●High performance-price ratio, high precision repair of threaded bearing steel, sharp, durable, locking strength, complete specifications, precision manufacturing, high efficiency, wide torque, high overall heat treatment, high hardness, wear resistance, light cutting Small resistance and chip space, large practicability, high strength and toughness, well matched with clear threads