K4 SOFT STEEL MANDREL making it ideal for both

making it ideal for both manual and automated applications

Engineered to meet the highest standards

and consistent results—even in the most demanding production environments

and heavy equipment industries

ensuring precision bore sizing and finishing

K4 SOFT STEEL MANDREL making it ideal for bothUnlock next level performance with Sunnen K4 tooling, engineered for fast, accurate, and repeatable honing in a wide range of applications. Designed for use with Sunnens industry leading machines, K4 tooling delivers exceptional versatility and tight tolerance control in small diameter bore finishing. Whether you are working in automotive, aerospace, or general machining, the K4 tools ensure consistent surface finishes and extended tool life boosting