The ISC Singing Tree Rope Wrench is a revolutionary SRT climbing tool. Manufactured by International Safety Components (ISC) in Wales, the Rope Wrench simplifies single rope ascent, especially when combined with a FIX tether. The Rope Wrench comes with a mid-line pin to allow quick installation on a climbing line, and the hex-head bolt allows for quick installation of a tether. Over the past four years, the ISC Singing Tree Rope Wrench (STRW) has become a well established, popular tool within the Production Climbing industry. Use of the Rope Wrench in competitions has been limited, as the STRW is now widely recognised by climbing organisations.