your screws require a stronger hold to resist gradual loosening and sudden breakage due to the excessive weight of the items they’re helping to support

as the anchor remains in place and allows you to use it repeatedly

Drive nails are stainless steel

#11 Heavy Duty Drill Bit - Stubby Length

1/2-20 x 6 Hex Cap Screw SS 18-8 (A2) Tie Wire Split Drive Anchors Zinc Plated your screws require a stronger1 2 20 x 6 Hex Cap Screw SS 18 8 (A2) . 18 8 stainless steel hex cap screws will have a typical composition of 18% chromium and 8% nickel. These percentages exist in 303, 304 and 305 series stainless steels so 18 8 is used at times to designate any and all of those alloy groups. 18 8 stainless steel offers good corrosion resistance and machines easily but will over time stain in coastal environments. They are also acceptable for use in ACQ pressure