The Notch Flow Adjustable Rope Wrench has an adjustable concave stainless steel bollard which provides custom friction setting. Engineered and developed in collaboration with Kevin Bingham and officially licensed from Singing Tree, the Notch Flow Adjustable Rope Wrench revolutionizes your basic SRS setup of a wrench and tether. Evolving from the original ZK-1 construction utilizing a bollard, the Flow is unique because it’s adjustable, giving you the freedom to customize the friction in your setup. The Flow provides an improved ultra-low drag ascent, saving you time and energy when you climb. Pair the Flow with the Fusion Tether to create the ultimate SRS setup.