STM Premium 3/8" x 7-5/8" OAL MT2 118º Notched Point HSS Standard Taper Shank Oil Hole Drill
Oil hole drills feature coolant passages throughout the length of the body. These allow a coolant (air, oil, or vapour mist) to reach the cutting edges. The resulting flow cools and lubricates the cutting edges and also aids in the extraction of chips.