I have water that stands in my garage and I needed to carve a slight trough to allow water to drain on one side. I was skeptical that this would last the 3 feet I needed to so starting at a slight angle and ending 3/4" deep and look good. It did the job and barely wore on the metal. This will do the job and then some.
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KSEIBI 686012 4 1/2 Inch Flap Disc 80 Grit Aluminum Oxide 10 Pack Auto Body Sanding Grinding Wheel.
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