Genuine Makita Steel Ball — part 216040-0. Precision hardened steel detent ball, 3.5 mm diameter, made to sit in the anvil/bit‑retaining assembly so your bits lock up tight again. Ideal when a worn or missing ball is causing loose bits or poor retention — simple, direct replacement to restore original bit engagement.
Details: 3.5 mm diameter steel ball (listed as “STEEL BALL 3.5”), sold as the Makita replacement component and used in the bit‑retention/anvil area of several impact drivers and wrenches. It’s the exact part number you’ll find on Makita parts diagrams, so you can match it to the exploded view for your model before installing.
Makita models this part is used in : DTD152, DTD153, DTD171, DTW190 and DTD145 impact driver/impact wrench. If your model is one of these and the detent/ball is worn or missing, this part will restore proper bit retention.
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