Snapper Slim Line Holders For Rail Or Lifeline MountingThese Snapper Slims are ideal for holding dock or roller furling lines. Their easy lock/easy release mechanism makes them a snap to use. They fit all standard life lines. A second adapter, included in the package, can be used to attach the Snapper Slim to 7/8" or 1" railings or stanchions, giving them more versatility.Features: Made of a UV protected nylon blend; Available in black or white; Will accommodate up to 40 ft. of 1/2 in. line;