Door Security Solutions (DSS) Tri-State / Denisco Kindler Group is an independent sales force representing ASSA ABLOY Door Security Solutions and the global leader in door opening solutions, ASSA ABLOY. DSS Tri-State has the answers that make sense for your particular building needs whether in an educational setting, health care environment, entertainment facility, retail locale or other setting. Our product representatives in the field are experienced and well-versed in specific market issues. Furthermore, our openings are comprised of door and hardware products from manufacturers who have been producing high quality, innovative products for generations.