Genuine Makita part 257288-5 — "Ring 21". This precision-formed 21 mm retaining ring is designed to sit in the tool-holder / front cap area and hold the bit/tool assembly securely in place on compatible Makita rotary hammers.
Fits (examples): HR3210C, HR3200C, HK1820 / HK1820L, HR3210FCT and DHK180. — check your exploded parts list for the tool-holder area to confirm fit.
Sold as a single genuine Makita replacement part for quick repair jobs — a simple, direct swap to restore proper retention of the tool holder. Keep this and other Makita spare parts on hand for fast maintenance.
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