Metolius Rock Rings メトリウス ロックリングス (Metolius Rock Rings) Training, Bouldering Pull-ups, Muscle Training These are the classic pull-up holds for climbing. Unused. Offers 4 grip types: jugs, incuts, flats, and pockets. How about strengthening your grip? Please understand that this is a used item. Thank you for your understanding. I can add more photos or answer any questions in the comments!