K4 HARD STEEL MANDREL Trusted by professionals across the

Trusted by professionals across the automotive

Perfect for high-precision industries demanding accuracy and repeatability

The Sunnen G Series is designed for high-performance and versatile machining

Built for durability and repeatability

Built for durability and accuracy

K4 HARD STEEL MANDREL Trusted by professionals across theUnlock 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