This is a single sided D-ring anchorage device that are installed at the ridge, hip-ridge or in the field for permanent or temporary use. Permanent use anchors are supplied with stainless steel nail fasteners and a butyl strip flashing. The 8-1/2 in length is idea for shingle type roofs allowing the anchor to be attached over the roofing material. The RS-10 is exactly 1/2 of our Retro-Fit anchor, making it an ideal complimentary anchor for hip ridges and shed roofs.