Your favorite DIY guessing game is back with another stumper and another piece of gear to give away. Toss out your best guess in the comments and the first and most precise answer will win a 20-ounce Stanley FatMax hammer.
Pretty sweet. Here's your clue: Not a place that's dead on a Saturday night, but a useful piece of equipment in a machine shop. 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.


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A boring bar?
boring bar tool for a CNC Lathe
That is a Lathe attachement that could be used to drill holes in a bowling ball.
Old school HSS boring bar tool for a CNC Lathe.
boring box and bar.
A Lathe boring tool.
looks like a cutting bit for a cnc cutter.
It's a lathe cutting tool for internal threading.
This is a Boring Bar Holder with the boring bar inserted
QC tool holder for 1/2" or 3/8" round boring bars
That's a boring bar for a lathe. Used for creating holes in the rotating workpiece.
too easy. and way too many of us machinists on here. PopSci, yer gonna have to really dig.
1177, you're our winner-- first commenter and first right answer. I'll email you for your real name and snail mail, and we'll get your prize shipped out.
Looks like we're going to need to get a little more crazy on all of you!
So get ready-- we're raising our game next time-- keep your guesses coming!
Taylor
PopSci.com
It is more than just a boring bar. With the triangular shaped cutter it is specific for cutting internal threads.
this is a boring bar mounted in a KDK tool holder for a lathe
its an extention for an electrical lockout switch
That's a rifle sight, for an antique Winchester Rifle. See back then they didn't have scopes, so you jiggled the screws a little, and then you lined them up for a perfect shot. Yep.... Could probably shoot a flea off a monkey's bottom with that thing.
This is a Quick change holder with an inside threading/cutting bit
This a boring bar mounted in a quick change tool holder for a lathe.
this is a quick change boring bar for a manual metal working lathe