Super Anchor Swivel-D Anchor Wood Purlin Install Kit for Buildings with Metal Roofing - Permanent Install - 1028-BPWKThe Super Anchor Swivel D anchor is a fully articulating anchor that rotates 360 degrees and swivels 180 degrees. It can attach to virtually any structure including steel, wood and concrete with the proper 5 8 fastener (see Instruction Manual for fastener specifications). It is factory supplied with a 5 8x2. 5 bolt and lock nut. The Swivel D is manufactured with a heavy duty stainless steel shackle and a zinc plated 2. 0 inside diameter forged steel D