These sets are designed for cutting threads of a variety of sizes, easily, and all with one set. Suitable for jobs involving a wide range of on site threading work.  There are single tap or three tap sets available in the same thread cutting range.  

        英制丝锥板牙组套OK35是专为切割各种尺寸的螺纹而设计的，而且都是一套。适用于各种现场穿线作业。在相同的螺纹切削范围内，有单丝锥或三丝          锥。