Square Adjustable Anchor Flange for 40mm sq. Newel Post. 316 Grade. Attachment screws NOT INCLUDED. Anchor flange requires an 8mm and 10mm hex bit sockets or hex keys to assemble. Can adjust from 0 degrees to a maximum of 55 degrees. We recommend putting our stainless adhesive on the 8mm and 10mm screws and on the inside of the adjustable joint when assembling. Also place stainless adhesive on the inside of 40mm tube when placing onto the anchor flange. NO WELDING IS NECESSARY. Base is 2.76" x 4.72".