Viking Drill and Tool 29600 Type 280-UB Magnum Super Premium Reduced Shank Drill Bit, 19/32" Premium 1/2-inch Reduced Shank Heavy Duty 135-Degree Split Point 3-Flats on Shank 135-Degree split point for accurate centering and fast penetration Precision ground point, flutes, body, clearance and drill diameter for ultimate accuracy and performance Special Hi-Molybdenum tool steel 1/2-inch shank - 6-inch OAL