Double shear nailing for fewer nails and faster installation. Dimples allow for 30 to 45 degree nailing through joist into header, resulting in higher loads and less nailing, and eliminate need for shorter joist nails in 2x applications. Meets ICC-ES ESR-1881, FL821, L.A. City RR25779, Dade County, FL 11-0510.01 and 07-0419.01codes. For additional information including allowable loads and fasteners, Please See USP Lumber Connectors charts in the Orgill paper catalog R7 Reference Pages.