Walter Surface Technologies Thunderbit® T3HD Black & Bronze Jobber Drill Bit, 4-1/8"" X 2-7/8"", High Speed Steel, I, 135° (012709)

Thunderbit® T3HD Black & Bronze Jobber Drill BitUnique spiral flute design improves chip ejection and coolant flowHeavy-duty core for increased strength and reduced breakage135° self-centering split point to prevent walkingBlack and Gold surface treatment for added lubricity and higher drilling speedsJobber length for most general applications