Certainly look like something the french would come up with.

That analogy to an Allen hex key is not far wrong, @Iridium rand.I see em as basically allen keys for bolts, break it loose with one end spin it out with the other
most of the time that’s perfectly fine and more convenient than combo wrenches most of the time, but you don’t have an open end and they’re much bulkier than a standard box end so you cover less ground than combos

Socket wrenches rock, at least for me.
You know you're not alone!'Zackly! Which is precisely what "socket wrenches" were well before the advent of detachable sockets and handles about 100 years ago.They're more a replacement for a loose socket on a breaker bar or ratchet.
I have a few of the smaller sizes that are the perfect tool for carburetor adjustments. As dnschmidt mentioned, the angled end is perfect for holding a lock nut in place while adjusting an inner adjustment screw or vice versa, tightening a lock nut while holding an adjustment screw in place. I wouldn’t mind having a complete set, but not a top priority.As weird as it may sound angled socket wrenches were a major factor in getting me to sell TOPTUL tools. I love the things and TOPTUL makes really nice ones. Getting me and my buddies sets of angled socket wrenches was a driving factor in my making first contact with TOPTUL. They didn't sell worth **** but anybody that bought them loves them as they are very comfortable on your hands compared to relatively sharp combination wrenches. You can exert far greater force for a given length with an angled socket wrench because you're not hurting your hand. Great for valve adjustments and on motorcycles where you have screws inside of lock nuts. Eric O. uses the one I sent him for changing out struts which have this exact situation. Trust me they will never be mainstream in America but that's our loss because once you use them you'll like them.
Below is an advertisement (from 1919) and some photos of Braunsdorf-Mueller socket wrenches from that era from my collection.
When they said "TOOLS THAT LAST" in the ad, I don't think they meant Facom appropriating the same basic idea almost 100 years later..., but it's as ironic as it is true.![]()
For those who may be curious about these, you don't have to spend a fortune to find out if they'll work for you:
Metric 9 piece set $36.16 including shipping. Nicely finished.![]()
A local surplus/overstock place has the Facoms. They're about the same price as that set--EACH!For those who may be curious about these, you don't have to spend a fortune to find out if they'll work for you:
Metric 9 piece set $36.16 including shipping. Nicely finished.![]()
Even Dave has to work sometime!I am surprised that @Dave455 has not chimed in!
Keep in mind, at one point, 50-odd years ago, ratchets were not as common as they are now and they were expensive! The clés à pipes were a clever and cost effective solution at a time when ratchets were an expensive luxury to tradesmen.
A different size tommy bar for each then?
For those who may be curious about these, you don't have to spend a fortune to find out if they'll work for you:
Metric 9 piece set $36.16 including shipping. Nicely finished.![]()
Facom 76.J5PB Angled Socket Wrench bi-hex set
French style "Cles a pipe". Unnecessary, obsolete... maybe, but interesting, and I stumbled upon them relatively cheaply while looking for something else. Think I'll put them on the wall to encourage me to grab them.
^ The DuraTech rolls I've received were all well-designed and seemed pretty well constructed.The roll is pretty nice as well.
When I first saw a modern version with the through hole in the back of the bell I remember thinking that the smaller sizes could be used as the crossbars for the larger sizes, which would be clever, but it wouldn't work fitment wise, and it would probably lead to distortions.Nah -- it's whatever fits. My friends in France usually use a screwdriver as a tommy bar.
When I first saw a modern version with the through hole in the back of the bell I remember thinking that the smaller sizes could be used as the crossbars for the larger sizes, which would be clever, but it wouldn't work fitment wise, and it would probably lead to distortions.
These antique (ca. 1919) US sets came with two crossbars, to accommodate two different diameter cross-drilled holes, one for the smaller range, and one for the larger range.


They absolutely are. Every single product.China (PRC) and they are still in the package - never used.
I shipped a set of them to @Chrome Vanadium Cody - but he's fallen off the planet.
Truper's website looks to ME like they're just a distributor of outsourced product. MY guess is that they're outsourcing those and having them re-branded.