Omega Products HSK63A End Mill Holder - G6.3 - 20,000RPM - 40mm - Gauge Length 160mmHSK63A end mill holders designed for high precision and high speed machining operations. These holders are manufactured to strict quality standards and feature a G6. 3 balancing specification, ensuring optimal performance at speeds of up to 20,000 RPM. The HSK63A taper provides a secure and precise interface between the holder and the spindle, minimizing runout and improving tool life. These end mill holders are compatible with a wide range of cutting