Betts Mr. Crappie Twist On Twist Off - Made with hard foam to last longer. The perfect way to put a slip bobber on the line. Just put the line in the slot and twist it on. It comes off the same easy way. No line cutting or abrasion. Extra cap included with bobbers stops and beads. Made with hard foam to last longer The perfect way to put a slip bobber on the line Extra cap included with bobbers stops and beads