The surgeon’s loop is an easy-to-tie knot for creating larger loops to attach sinkers to the end of a length of leader. It can also be used to create a longer, doubled length of line for rigs like the Belmar rig, but due to the bulkier nature of the knot, it is not intended to be reeled through the guides.
The perfection loop forms a small loop at the end of a leader. It can be used to finish off pre-snelled hooks or as a way to securely attach smaller barrel swivels to the ends of leaders used while surfcasting with lures.
Non-Slip Mono Loop
When tying lures and flies directly to the leader (without the aid of a split ring or snap), most offerings benefit from a connection that provides a larger range of motion, like the non-slip mono loop. Tied small, this loop knot creates a stealthy connection while allowing the lure or fly to swim freely and more naturally. Despite the name, this loop works equally well with monofilament and fluorocarbon.
When creating bottom-fishing rigs like the high-low rig, the dropper loop creates an offshoot of doubled line in the middle of a leader onto which hooks, jigs, or flies/teasers can be looped. The additional stiffness provided by this doubled line helps keep the hooks or lures away from the leader, reducing tangles.