The node Explorer
This node is typically used in mountaineering. It fit on the ends of the rope used for insurance purposes, and also for fixing the ropes on the terrain or on a backup system.
The knot does not slip and fit easily even with one hand, but it is difficult to untie and it does not work on the middle rope.
1. Fold the horses, ropes in the form of a loop, and then generate from it another loop.
2. Skip running the loop through the root. Get a simple node. Secure it by pulling simultaneously on both ends.