I Made Grinding Discs Fight, And This Happened!

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Walter Flex Cut (Part# 15L843 and 15L853)
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COMBICLICK® Fiber Disc and Backing Pad Combo (Part# 48194)
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Norton Blaze Flap Disc (Part# 63642501865 and 66261183486)
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Norton Gemini Hard Disc (Part# 66252843591)
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Fireball Abrasives Section
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Which grinding disc is the best? I put my favorites to the rest to determine what the strengths are for each. Then I put them head to head to go against each other for some grinding disc destruction! I use the slow motion camera to analyze the results. Join me and find out which one is the best and why.
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