CONFAST 3/4" Double Expansion Anchor - Heavy Duty Screw-In Anchors for Concrete & Masonry (10-Pack) - Perfect for Shelving, TV Mounts & Structural Fastening

ApplicationsThe anchor is made from Zinc Alloy. This anchor is designed for use in Concrete, Block, and Brick.EnvironmentThe anchor is designed for use in a Moist environment.Hole Diameter/Bit DiameterThe anchor requires a 1-1/4" hole to be drilled in the base material (Concrete, Block, and Brick). The hole should be drilled with carbide tipped bit that meets ANSI standards and used in a hammer drill.Minimum EmbedmentThe minimum anchor embedment into the concrete is 3-15/16". Therefore, the anchor must be installed so that a minimum of 3-15/16" of the anchor is embedded into the concrete.Spacing between AnchorsEach anchor must be spaced a minimum distance of 12-1/2" from each other when measured center to center.Edge DistanceIt is very important not to install the anchor any closer than 6-1/4" from an unsupported edge of the concrete.