Owner Ringed Mutu hooks are Super strong with Stainless steel rings in the eye of each hook that reduces stress on the hook and making overall unit stronger. Ringed hooks also allow live bait to swim more naturally, and once hooked up, the hook pivoting on the ring tends to wear less of a hole in an active fishes mouth. All models and sizes are now available in both Pocket Packs and Pro-Packs. Sizes 1/0, 2/0,3/0,4/0 hooks are factory ringed, sizes 4,2,1,5/0,6/0 are only available custom ringed by RingedHooks