All right, smarty pantses, give this one a go. Lately, you brilliant DIYers have been making short work of our Guess This Tool contest, so we're going to mix it up a little and see if we can't stump you for more than 10 minutes. This is a tool of sorts, but it's in the early stages of a PopSci Dissection. As usual, the first and most precise answer in the comments will win something from our friends at Stanley: a FatMax 24-inch level. Good luck.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.