7/9 McCall Hoe Scaler 7/9 McCall Hoe Scaler SM7/9 Used to dislodge heavy supramarginal calculus deposits. Use a pull stroke. Where to Buy x Category Dealer PartnersSales RepresentativeStrategic MarketsSchools RepresentativeAccutron™ Equipment Sales Zip Code Find RepresentativeReset Select a category, input a zip code and click on Find Representative, or explore the complete list here.