1-1/2 X 9-3/8 X 15″ 4MT Taper Shank Drill – 118 degree split point. – Designed for drilling in many different materials and a wide range of applications. – These drills feature a surface treatment to improve chip flow and a taper shank made to American National Standard (Morse) dimensions. – Black oxide finish for increased wear resistance and improved lubridity, reducing chip welding and galling.