9X1/4X7/8 TYPE 27 DEPRESSED CENTER WHEEL GEMINI Unique, patented mini-mount for 4.5" wheels Fast Cut - re-engineered for quick stock removal on hard materials Long Life - excellent life and cut rate on stainless steels and metals Applications: Grinding Applicable Materials: Metal, Steel Product Specifications BRAND Norton MANUFACTURERS PART NUMBER 66253048991 MAXIMUM RPM 6600 STYLE Long Life SUGGESTED USE Metal, Steel WEIGHT LBS 3.17 ARBOR SIZE 7/8 in DIAMETER INCHES 9