No-load Speed: 26000rpm. Power Inverter for Dewalt 18/20V Battery DC 18V to AC 220V Battery Inverter 150W. For Dewalt 18V 20V Battery. It is compatible with Dewalt 18V 20V batteries (not included). The brushless motor of this straight grinder has a no-load speed of 26,000rpm and 4 adjustable speeds, so you can adjust the speed of the straight grinder for different usage scenarios to get the best experience.
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