Nite Ize Figure 9 Carabiner Rope Tightener / Tensioning Tool - Black, Large C9L-02-01

Clipping into your rope allows you to use the dual-purpose carabiner to pull the rope tight to increase tension or loosen the knots at the same time for a quick tighten every time. It also features a distinguishing ridge on the back that allows for an easy attachment to your carabiner or keychain.