Back in the bad old days, when you needed to grind chisels, your only option was a high-speed electric grinder with really coarse, gray wheels of indeterminate
Norton 3X Grinding Wheels - Lee Valley Tools
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Norton® 66253043450 38A Straight Toolroom Grinding Wheel, 8 in Dia x 1/4 in THK, 1-1/4 in Center Hole, 120 Grit, Aluminum Oxide Abrasive
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Norton 3X Grinding Wheels - Lee Valley Tools
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Norton 3X Grinding Wheels - Lee Valley Tools