Chicago-Latrobe 57728

The CHICAGO-LATROBE 57728 is a jobber-length drill bit set composed of 115 high speed steel drill bits rated for drilling cast iron and steel. The set includes fractional inch, letter, and wire sizes ranging from 60 (1/16″) to 1 (1/2″), with two-flute, conventional point bits intended for right-hand cutting. The bits feature a black oxide finish and straight shanks, supplied in a metal index case for organized storage.- Drill bit sizes included cover 60 to 1 and A to Z, with increments in fractional, letter, and wire gauges. – Manufactured from high speed steel for general drilling applications. – Jobber-length drills with overall lengths varying from 1 5/8″ to 6″. – Point angle of 118 degrees and conventional point type for general drilling tasks. – Two-flute spiral design with helix angles between 21° and 34° and right-hand spiral direction. – Straight shank type with shank diameter of 1/25 inch. – Complies with ASME B94.11M-1993 standards. – Supplied in a metal drill index case for convenient organization and access.