Durable Click Sign Holders For Interior Walls, 6.75 x 0.625 x 5.125 Inches, Graphite (4861-37) Click sign holders make it easy to keep signage current. Easy-open, transparent acrylic window lets you update messages in seconds. Ideal solution for interior signage to identify room functions, employee names and titles, tenant names and more. Design software is a free download from www.durableofficeproducts.com Mounting hardware included with each sign holder.