Amazon offers the DeWalt 4-1/2" x 1/4" x 5/8" General Purpose Metal Grinding Wheel, model no. DW4523, for $2.03. Add it to your cart via Subscribe & Save to drop it to $1.93 and bag free shipping. That's the lowest total price we could find by $2, although most places charge $11 or more. It features aluminum oxide grain construction.

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