Genuine Makita Grip Base 417630-4 — replacement front/auxiliary handle base for percussion and rotary-hammer drills. This molded polymer (black) grip base restores the original mounting point for the auxiliary handle and is designed to take the standard M8 fastening used on these assemblies (works with the M8x110 hex bolt and matching hex washer in the handle kit).
Fits a range of Makita models (examples include HP1620, HP1621, HP1630/31, HP1640/41, BHR262, HR2020 and several BHR/DHR/HR series rotary‑hammer models), so it’s a direct replacement where the original handle base is cracked, worn or missing.
Pairs with the Grip 36 complete assembly (part 153503-4) and the associated M8 hex bolt/washer hardware for a neat, secure installation; installation requires only basic hand tools to remove the old base and refit the handle assembly.
If your drill feels unstable or the auxiliary handle will no longer clamp tight, this original Makita part brings back correct alignment and control—an easy, reliable repair using genuine Makita power tool parts.
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