The Flashmer Rolling Seul connects two sections of line with a swivel, featuring a knot at each end. It minimizes the twist transmitted from the terminal tackle to the main line. It is used in surfcasting, support rigs, carp fishing, and lure fishing setups. The range extends from No. 22 to No. 2, with breaking strengths from 8 to 62 kg. This clipless version is sold in packs of ten swivels of the same size.