Make sure this fitsby entering your model number. Accurate RPM display (ad)- 4 digit RPM display, a Torq industry first takes the guess work out of polishing by accurately displaying your RPM as you polish Harmonious balancing (HB): internal components and machine configuration finely balanced for superior ease of use and unmatched user comfort User Centered Design (UCD): Designed with user comfort and control for maximum efficiency Precision power (P): powerful 900 Watt motor provides smooth power delivery and start-up function at every speed setting Rapid-release – (R): the most Advanced rotary polisher also features the most Advanced spindle lock and backing plate release button design