The QRD-1006 is a wedge block that allows other equipment to fit into the QRB-1002 quick release shoe. For example, mount it to your Sol Searcher so that you can easily remove it when packing up.
Tele Vue Dovetail Base for Televue Quick Release Finder Scope Bracket
Quick Release Tele Vue Dovetail . This machined metal, pre-drilled dovetail base attaches directly to the Tele Vue Universal Finder Mount so it can be converted to a quick-release mount. For solar observers who want a quick conversion, the Sol Searcher finderscope can also be made into a quick-release accessory when mounted on QRD-1006 (Dovetail) used with QRB-1002 (Quick-release bracket). Manufactured by Tele Vue for top quality!