Odd tools ???

[dubdoc]

OK, bought a set of nice 3/8 drive metric and SAE sockets for my new box, and the set came with a few surprises. One, is this set of square bit drivers. I've been a tinkerer and restoration guy for almost 60 years now and never saw a place I could use one of these. The second picture is 2 more items. Both are marked 10mm. One is a triangle bit and the other has a square hole in the end. Again, baffled. What are they for?

 

[JR 42]

Drain plug sockets is my guess.

https://www.amazon.com/dp/B01N2YGB06/?tag=atomicindus08-20

Edited to add, my old long- gone AMC built Jeep pickup had 1/2" female square drain and fill plugs on the (manual) transmission and transfer case.

Some gearboxes, final drives, and whatnots on old IH combines and tractors did as well, different sizes too.

 

[Ralf11]

you could Google the number stamped on them to be sure

 

[Corndoggeh]

A square bit is used for some belt tensioners too.

 

[joe_padavano]

Square drives are frequently used on pipe plugs.

 

[4xdog]

ISTR that triangle drive used on some European tamper-resistant items. I think we used to have a large recycling bin in our lab that had one of those on the latch.

 

[JSHOUSE1]

Defiantly drain plug sockets.

 

[dubdoc]

Thanks guys. I guess I'll keep them........just in a bottom drawer.

 

[Iowafox]

If you have a older truck you can use one of the square drive ones to open the rear differential to check the level of the fluid. You can also use them for small plumbing jobs in metal pipes. There weird for sure. I have 2 snapon ones the opposite of the ones you have just a square hole threw it all one is for a 1/2 and ones for a smaller size. No idea where I got them. Never used them yet but when I need to I have them!

 

[BlakeTheCarGuy]

The square ones I use on my dads Freightliner truck they use them for a lot of things the oil pan, transmission pan, and some other plugs on the engine too.


Sent from my iPhone using Garage Journal

 

[engineer2]

For decades if a GM vehicle needed a pipe plug, it was generally a female square drive.

 

[bsaint]

I have a master Mac drain plug kit and that triangle one is in it. Ill tell you what the application is Monday.

 

[KnurledNut]

Triangle:
10mm Renault

Square:
7mm BMW, Ford, Toyota, Renault
8mm Citroen, Peugeot, Renault, Talbot, Volvo
10mm (many gearboxes/diffs) BMW, Ford, Toyota, Renault
11mm Ford
13mm Nissan, Subaru
5/16 (some domestic oil galley plugs)
3/8 Honda, Mazda, Renault, Saab, Volvo

 

[joshmodelskidoo]

Flat head mopar engine uses the square sockets. No idea on the triangle