7 x 1/4 x 5/8-Inch Metal Grinding Wheel Brand_Norpro Works with water pressures of

Works with water pressures of 15 to 80 psi

5V secondary terminal screws

Skid pads add extra layer of corner protection & diamond plate stainless steel insert reinforces

No Need For Secondary Grinding

7 x 1/4 x 5/8-Inch Metal Grinding Wheel Brand_Norpro Works with water pressures ofMaster Mechanic, 7" x 1 4" x 5 8" 11 Arbor, Hubbed Metal Depressed Center Grinding Wheel, Double Reinforced With Industrial Grit & Glue For Increased Life & Durability, Superior Friability Allows Wheel To Break Down Quickly, Consistently Exposing New Grain For Increased Sharpness & Longer Life, For Low Angle & Vertical Grinding, Max RPM Rating 8,700.