Applications: the anchor is made of carbon steel and is yellow zinc. This anchor is designed for use in concrete only, and should never be used in block or brick base material. Environment: the anchor is used in a dry environment. Hole diameter/bit diameter. The anchor requires a 1/2 inch hole in the base material is drilled (concrete only). The hole should be drilled with carbide tipped bit that meets ANSI standards and used in a hammer drill. Diameter of anchor. The diameter of the dowel is 1/2 inch. Anchor length: the length of the anchor is 3-1/2 inch minimum embedment. The minimum anchor embedding in the concrete is 2 inches. Therefore, the anchor must be installed so that a minimum of 2 inches of the dowel is embedded in the concrete. Maximum Fixture Thickness The maximum thickness of the attachment part or the maximum thickness of the material is attached for an anchor 1 inch. This ensures that the minimum embedding of 2 inches is met. Fixture hole diameter the hole is attached in the jig or material, larger than the designated diameter of the dowel. The 1/2 inch diameter anchor requires the hole in the attachment its 9/16 inch from each other. The distance between the anchors, each anchor must be spaced at a minimum distance of 5 inches when measured from centre to centre. Edge spacing. It is very important not to install the anchor closer than 2-1/2 inches from an unsupported edge of the concrete.