Tapcon® 24323 Maxi-Set Hex Flat-Head Concrete Anchor, White, 1/4"x2-1/4", 50-CtWith a large diameter flange, the Maxi Set Tapcon provides more surface area coverage than regular Tapcon anchors for reduced cracking and maximum security. They are versatile screw anchors ideal for a wide variety of applications including, shutters (protective and decorative), screened porch and pool enclosures, various steel metal flashings, decorative wrought iron and wood nailers and plywood attachment. Made of steel and coated with Ultra shield