1. Mainly made of carbon steel, sturdy constructed, ensure high strength. 2. Light and small, inherit flexibility without compromising strength. 3. Deliver ultra-smooth rotation and minimum twist. 4. Good for various rigs and leader trace making. High performance in bass fishing, general freshwater and saltwater, offshore fishing.

http://olla.gr/100-pcs-8-word-shape-fishing-rolling-swivels-dual-rings-connector/