A $50 cordless angle grinder would defeat it, I would think. Something like this might slow it down some https://m.northerntool.com/shop/tools/product_2003152

A $50 cordless angle grinder would defeat it, I would think. Something like this might slow it down some https://m.northerntool.com/shop/tools/product_200315235_200315235 https://m.northerntool.com/shop/tools/product_200315235_2003... but still, an angle grinder is pretty effective.