Some of the knots that are useful for rock climbing. Reef Knot (Square Knot) Comes in handy when you need to bundle things together with a rope. While it is also commonly used for extending the length of a rope, it is not recommended as the knot could be unstable. #reefknot #vesperfilter A video posted by Royce To (@royceto) on Mar 26, 2014 at 2:20am …
