Use the P-Line Rolling Swivel as a staple in your tackle selection as the optimum connection between your mainline and your leader. Great for guides and fishermen who go through a lot of terminal gear. Per 25. Available: Size Length (in.)#3 5/8 #5 9/16 #7 1/2 #10 7/16Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Swivels.