These beads have multiple roles in a rig (e.g. for Surf Casting, Casting, or bottom fishing):

• Knot Protection: They are placed between a sinker and a swivel snap to absorb shocks and protect the knot from constant friction.

• Rig Construction: They are used as "stops" to hold the leaders (stoppers) in the correct position on the main line of the rig.

• Attraction: Their color and presence near the bait can act as a visual stimulus for fish.