The nylon flange head adds stability in hollow surfaces

They are nickel plated for appearance

1/4-20 x 1 3/4 Simpson STB2 Wedge Anchor 304 SS (100)

18-8 stainless steel offers good corrosion resistance and machines easily but will over time stain in coastal environments

3/4-10 x 4 Flat Socket Cap Screw Alloy

#43 Heavy Duty Jobber Drill Bit (12) Wedge Anchors Mechanically Galvanized The nylon flange head adds#43 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.