What is this? A saw for -- bah, we'll spare you that joke. You probably knew it was coming the moment you spotted the image above, because yes, that's a teeny tiny circular saw that actually works. It was created by New Zealand native Lance Abernethy, who also made a minuscule power drill earlier this year. Abernethy designed each of the saw's parts himself and printed them out using PLA plastic through an Ultimaker 2 3D printer. The scaled-down tool is powered by a hearing aid battery and roars to life when you click the button on its handle, but it can't actually cut through anything.