7 8 9 x 28 A307A Hex Bolt Plain Steel 1 8 Grade 5 Hex Cap Screws Plain Domestic USA Over sized thread diameter tightly fills 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 1 8 x 5 1 2 Grade 8 Hex Cap Screw Yellow Zinc Plated Material is manufactured with rolled threads Tensile strength will meet or exceed 60