Over-sized thread diameter tightly fills the existing spike holes for better holding strength and a watertight fit #3 square drive virtually eliminates cam-out during hard to reach installations Durable UV resistant white and brown head paint matches most gutter systems Thick galvanized base coating guaranteed not to rust or react with aluminum Free driver bit included American made

3/4-10 x 4 1/4 Simpson Wedge Anchor 304 SS (10)

3/16 Heavy Duty Jobber Drill Bit

7/8-9 x 4 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated

Hardness for plain and zinc plated washers is HRC 38-45 and HRC 26-45 for hot-dip galvanized washers per ASTM F436

7/8-9 x 1 1/2 Hex Cap Screw SS 316 (A4) 3/4-16 Hex Cap Screws 18-8 Stainless Steel Over-sized thread diameter tightly fills7 8 9 x 1 1 2 Hex Cap Screw SS 316 (A4) . 316 series stainless steel differs from 18 8 by its molybdenum content (2 3%) and a higher nickel content (10 14%). 316 stainless steel has greater corrosion resistance than 18 8 as well as superior strength at high temperatures.