Wiseman Threading Tools Taper Lead Metric HSS Tap Right Hand - M39x4The Wiseman Threading Tools Taper Lead Metric HSS Tap is a purpose built internal threading solution designed for durability and precision in metric sizes. Ground for accuracy and uncoated for predictable cutting performance, this right hand tap follows ISO 529 dimensions and delivers a taper lead that makes starting threads smoother, especially in harder metals or tighter tolerances. Why this taper lead HSS tap stands out Taper lead design: A gentle