Pikepro SWIVEL COVERS (Pack of 40) Designed to be used over the lower hook on a two-hook trace and on teh trace swivel, these Swivel Covers have a long tapered shape that helps to reduce tangles. Use on all lure and bait traces to create a neat finish. Product Usage: Use on trace swivels and the lower hooks on 2-hook rigs to create a neat finish over crimps and wire twists.