Matte Black Metal Mitered Corner Sign Holder. Has threads to accept both a 3/8" or 1/4" stem. This metal sign holder features 11"W x 7"H of display area. Use this metal sign holder on display tables such as nesting tables or three-tier tables, or use it on countertops. Shop for metal sign holders and metal mitered corner matte black sign holders at Palay Display. In Stock.