Ronix Spinner Surf Rope AttachmentRonix Spinner Surf Rope Attachment The Ronix Spinner Surf Rope Attachment is a swivel section that clips into an existing surf rope and lets the rope rotate independently of the handle. Over a long session, line twist builds up and turns into knots the spinner stops that before it starts. Buy it as an add on to any standard surf rope setup. It's a single purpose accessory for riders who run long sessions and don't want to stop and untwist their line