Designed as a very convenient alternative to tungsten putty, they provide a secure fit over the swivel knot or trapped on a short loop. Perfect as a counterbalance on Ronnie rig booms and on the hook section of a hinge rig. The beads need to be pierced with a splicing needle or fine bait needle then threaded onto the link and pushed over the swivel or loop knot. Containing 75% tungsten, the Small weighs 0.3g, perfect for 12mm pop ups combined with a size 6 Ronnie. The Large weighs 0.6g for 14 16mm pop ups on a size 4. Different combinations can achieve critically balanced or over-weighted presentations and the beads can also be trimmed for precision balancing. Unlike tungsten putty, these beads are crayfish proof and provide a consistent and easily repeatable alternative to putty. 8 beads per pack.