Sleeve-It SD-1 is a pre-engineered post anchoring solution for enhancing below-grade foundational stability in fences and hand rails placed on top of a segmental retaining wall (SRW). Because of its cantilevered form and other properties, using Sleeve-It during the SRW build permits a code-compliant fence to be constructed eliminating the 36” offset requirements of IBC 1015.2. Build it Right. Build it with Sleeve-It.