Tri-Beads provide a great medium stiffness option for rigged trolling baits, single lures, spreader bar stingers, and more. They also work well for stopper beads for bulb squid and machine style lures.
The force of the lure passing through the water while trolling, and the lure head pushing against the stack of beads creates a "tower" of beads in a semi-stiff fashion. Stiff-Rigs can improve your trolling hook up ratios, as they maintain an even hook position as fish strike.
These are the specific go-to rigging beads for hundreds of manufactures across the USA.
Sold in 50 count, and 1000 count bags.