Ruko manufactures the 102125T Countersink, a high-speed steel tool with a 31 mm diameter. It features a titanium nitride coating for enhanced durability and performance. This countersink is typically used in machining applications to create conical holes that accommodate screw heads. https://elecena.pl/product/28443580/ruko-102125t-countersink-31mm-hss-tin-coating-sharp-cutting-grooves 2025-04-16 https://elecena.pl/product/28443580/ruko-102125t-countersink-31mm-hss-tin-coating-sharp-cutting-grooves 2026-06-11 https://elecena.pl/product/28443580/ruko-102125t-countersink-31mm-hss-tin-coating-sharp-cutting-grooves 2026-07-04 https://elecena.pl/product/28443580/ruko-102125t-countersink-31mm-hss-tin-coating-sharp-cutting-grooves 2026-08-20