United Abrasives /SAIT Depressed-Center Wheel: Type 27, 4-1/2" Dia, 1/4" Thick, 7/8" Hole, Aluminum Oxide - 46 Grit, Resinoidfrom $13.00 up to $199.10 Compare prices3→Depressed-Center Wheel: Type 27, 4-1/2" Dia, 1/4" Thick, 7/8" Hole, Aluminum Oxide