Product Overview
Alfa USA Screw Machine Length SWG Number Drill Bit, #57 Diameter, 0.0430 Decimal Equivalent, 1/2" Flute Length, 1-3/8" Overall Length, High Speed Steel, 135° Black Oxide Finish, Straight Shank, Right hand Spiral, NAS 907 Type C, Heavy Duty, Made in USA, 12 per Envelope
