Simpson URFP-SDS3-B Universal Retrofit Foundation Plate w/SDS Screws - 570 PkgThe URFP SDS3 B Universal Retrofit Foundation Plate universal design provides a method to secure the mudsill to many foundation types. The URFP scalloped, slotted hole feature allows installation flexibility when the mudsill is offset or inset from the foundation edge. With allowable loads deriving from longitudinal embossments and stiffening darts, the URFP may be used as a one for one replacement of 1 2" or 5 8" mudsill anchors. NOTE: The correct