Omega Products - HSK63A Face Mill Holder - G2.5 - 25,000RPM - 16mm Spigot - 100mm Gauge LengthHSK63A Face Mill Holders are designed to securely hold face mills with a G2. 5 shank. These holders are made from high quality materials and are compatible with HSK63A spindles that operate at speeds up to 25,000 RPM. The holders feature a precision bore and a flange that provides maximum rigidity and stability during machining operations. The G2. 5 shank ensures quick and easy tool changes, while the balanced design minimizes vibration and ensures a