Zinc plated material will meet or exceed ASTM F1941

17/64 Cobalt Heavy Duty Jobber Drill Bit

5/8-11 x 12 Simpson Wedge Anchor 303 SS (10)

3/8 Heavy Duty Jobber Drill Bit

Precision ground for high degree of concentricity between shank and body diameter

#37 Heavy Duty Jobber Drill Bit (12) 5/16-24 Socket Cap Screws Alloy Zinc plated material will meet#37 Heavy Duty Jobber Drill Bit . Web construction is heavier than general purpose construction making it particularly suitable for cotter pin hole drilling and cross hole drilling in head of bolts. The heavy construction affords efficient drilling in stainless steel and other hard materials. The split point reduces the thrust requirements and minimizes walking.