Once again technology has made our old proverbs obsolete, take the old “square peg/round hole” saying, for instance… I’m sure there’s a joke in there somewhere, but I can't find it.  Currently your choices for hole saws and drill bits are round and more round, so those pesky square holes that need cut for electrical boxes require a jab saw or a router.  It’s not terribly difficult to cut square holes using those methods, but, one company has taken it upon themselves to make the process much quicker.