Omega Products HSK63F ER Collet Chucks - G2.5 - 25,000 RPM - ER16 - 100mm Gauge LengthHSK63F ER Collet Chucks are precision toolholders designed for high speed machining applications. These collet chucks are made with HSK63F shanks, which provide excellent rigidity and accuracy during machining operations. The G2. 5 runout ensures minimal tool deflection and vibration, resulting in superior surface finish and tool life. The ER collet system allows for a wide range of tool diameters to be clamped, making these chucks versatile and