The Flashmer Stainless Steel Rolling Swivel with Clip combines a swivel and a wide-opening double clip. The entire unit is made of stainless steel. The clip is used to change lures or leaders, and the rolling mechanism limits the rotation transmitted to the line. The breaking strengths range from 10 kg for size 8 to 70 kg for 2/0; sizes 1 and 1/0 are both rated at 55 kg. Each pack contains six pieces of the same size.