High speed steel bit with 135 deg split point starts on contact to keep the bit from walking for fast, accurate holes. Used in applications such as drilling on curved surfaces, 3-flat shank won't slip in arbor or chuck, parabolic flute clears chips faster.
3 flat shank won't slip in arbor or chuck
3 flat shank won't slip in arbor or chuck
135 deg split point provides accurate hole placement