K16 HARD STEEL METRIC MANDREL Sunnen JN Series tooling is

Sunnen JN Series tooling is a high-performance

D2 tooling delivers the precision and repeatability professionals demand—every time

Sunnen JK12 tooling is a precision-engineered component designed to enhance the versatility and performance of Sunnen's K Series honing tools

and consistent bore geometry—critical for peak firearm performance

Engineered for rugged environments

K16 HARD STEEL METRIC MANDREL Sunnen JN Series tooling isBoost your honing efficiency with Sunnen K16 tooling, engineered for unmatched precision, durability, and performance. The K16 tooling system offers fast setup, consistent bore sizing, and superior surface finishes. Built for demanding applications, it is the trusted choice for machinists who demand accuracy and reliability every time.