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https://www.mskdrillbits.com/h....rc65-cnc-tools-high-
Half Round Slicers are around for cutting entire loaves or individual bars into half moon figures. No set up is required. They're used for newly de-molded cleansing. Then must to know what kind of hole in order to going to drilling. Could be the hole likely to be to put together a self tapping screw to get started in or could be the hole the expanding bolt and so needs to get as thick as the fastener will be? You may even need bits for concrete to make really large holes for something like electrical cab