This critter ought to be handy — a tiny circular saw. Clarke is marketing kits for the saw with blades for various applications including wood, metal, plastic, drywall, and ceramic. With precise depth adjustment and what looks like no additional guard, this saw can get into tight spots and still cut a straight line.
The pretty, hype-ridden PDF flyer does give some good examples of uses, even though it ignores the really useful fact that it’s small.
Street pricing on the kit is $100.