These fishing rolling swivels have been designed with functionality in mind. At the slightest amount of pressure the swivel will begin to rotate. That means less tension and line twist.
With the round loop design you can be sure that you can get a secure knot. The black colour of the swivels also ensures that it will be harder for fish to notice this piece of equipment.
This bulk pack of fishing swivels are great as they come in their own carry case with built-in separators and 6 different sizes.