Genuine Shimano Anti-Reverse Ratchet (part #107ZH) — the toothed ratchet wheel that works with the pawl to prevent backward rotor rotation in non-instant anti-reverse systems. A worn or chipped ratchet allows the handle to click back under load, reducing hookset efficiency and control during the fight. Cross-references with Shimano part number RD3656. OEM replacement ensures perfect fit and factory performance. Available from Offshore Tackle & Repair in Stuart, FL — your trusted source for genuine Shimano reel parts.