Chicago-Latrobe Screw Machine Length Drill Set, Heavy Duty, Series: 159, Imperial System of Measurement, 1/16 in Minimum Drill Bit Size, 3/8 in Maximum Drill Bit Size, 135 deg Drill Point Angle, 21 Piece, Specifications: Right Hand Cut, Spiral Flute, Split Point, Straight Shank, HSS, Oxide Treated

The CHICAGO-LATROBE 159 Heavy-Duty Drill 21-piece drill set (1/16 - 3/8 X 1/64) features a rigid, short flute design and 135 deg P3 split point for tough materials like steel and cast iron. Built from premium high-speed steel with a black oxide finish for wear resistance and improved chip flow. Manufactured to NAS 907 Type C aerospace specs for high-performance hand or machine drilling. NOTE: Black oxide and titanium nitride (TiN) finishes standard from stock (Style 159-TN); alternate coatings available as stock modifications. Sizes under .0625" do not have split points.