550 NAS-Type Heavy-Duty Cobalt Straw Jobber-Length Drill Bit Set, 29-Pc, 1/16 in to 1/2 in dia Cutting x 1/64th

Chicago-Latrobe® 550 NAS-Type Heavy-Duty Cobalt Straw Jobber-Length Drill Bit Sets

Description

  • Manufactured to NAS 907 Type J geometry aerospace specifications
  • Heavy-duty construction for drilling in tough, high-tensile, and work-hardening materials
  • Manufactured from premium cobalt high-speed steel
  • Straw finish adds lubricity and easily identifies cobalt drills
  • 135° P3 split point is self-centering for reduced thrust and easier penetration

Specification

Brand