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1/4 Cobalt Heavy Duty Jobber Drill Bit

Diameters over 2 1/2 inches have a meet a minimum of 140

#26 Heavy Duty Drill Bit - Stubby Length

1/4 x 3 Mushroom Spike Zinc Plated (100)

#31 Heavy Duty Jobber Drill Bit (12) 7/8-9 Hex Cap Screws 18-8 Stainless Steel Toggle bolts#31 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.