DBI-SALA Advanced Flush Floor Mount Sleeve for Existing Concrete* This Floor Mount Sleeve bolts into existing concrete floors to provide an anchor point base for an offset davit mast. * The flush mount design with recessed fastener pockets allows passage of personnel and equipment by eliminating trips hazards when not in use. * This davit base is bolted into existing concrete where frequently confined space system set up is required and provides a permanently installed davit mast base. * The Zinc plated hardware