Leader Surf 30 lb ;these 36 inch monofilament nylon leaders are tied with two dropper loops and feature a barrel swivel for mainline hook-up and a snap swivel for a quick and easy way to attach a sinker.;leaders/leader material ;Danielson;leader easily attaches to line with barrel swivel. 30 lb monofilament. ;Theres nothing like the fishing sport to calm your frazzled nerves or relax on a nice spring day.