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Amazon.com: Precision Ground O1 Tool Steel Flat Bar .250" Thickness x 1.50" Width x 18" Length 1 Piece : Industrial & Scientific
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Amazon.com: Starrett Oil Hardening O1 Tool Steel Flat Stock, Precision Ground, Standard Tolerance, ASTM A681, 6" Width, 1 1/4" Thick, 36" Length : Industrial & Scientific
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