High Speed Steel Black & Bronze Fractional Set 29 Piece
Thunderbit® drills have a special heavy-duty core that guarantess increased strength and reduced breakage. Unique spiral flute design improves chip ejection and coolant flow to the point. 3/8" reduced shank, 135 split point.
Features:
Unique spiral flute design improves chip ejection and coolant flow
Heavy-duty core for increased strength and reduced breakage
135° self-centering split point to prevent walking
Black and Gold surface treatment for added lubricity and higher drilling speeds
Jobber length for most general applications
Made in USA
Applications:
Drilling in medium strength alloy materials
Portable drilling in metal
Tech Tips:
Speed, feed, and lube are all critical to cutting tool performance
