Omega Products DV50 End Mill Holder With Coolant Channels - 25,000RPM - G2.5 - 12mm Bore Size - 160mm Gauge LengthThese holders feature built in coolant channels that allow for effective coolant delivery directly to the cutting edge of the end mill. This coolant flow helps in reducing heat and prolonging tool life, while also improving chip evacuation to maintain a clean cutting environment. With a maximum speed rating of 25,000 RPM and a balance grade of G2. 5, these holders ensure smooth and precise operation, minimizing vibrations and maximizing cutting