Suppose you need to modify an enclosure by drilling a hole in it to install a drain (or for some other purpose). How can you do this in a way that leaves a perfect hole with a minimum of work? First, ...
When plumbers and electricians need to drill a large hole in framing lumber or other material—to make way for pipes and wiring—they usually opt for a self-feed bit (above). Such bits max out at a ...
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