Nice Matco box too!

Now, IF you really want to have fun then send the Apprentice to the Storeman and have ask for either a couple of long weights ( waits) or a box of 1/2 inch, left-handed holes, that really works well and you get some good laughs.
When I worked on the Railways we used to confuse the ' newbys' with things like;
a) sending into the engine rooms of the Diesel-Electric Locos armed with 2 cans of WDF ( Water Dispersing Fluid) after telling them to spray ever spark-plug,
b) tell them that such and such a Loco sounded like it had a flat tyre and it was their job to change it, Yes, rail vehicles do have tyres, they're the bit that touches the rail and has the flange on the edge of it, BUT, they're made of steel and sweated onto the actual wheel,
c) send him/her to the storeman to get a pair left-handed ring spanners.

I don't get it. What are those things?

Do you have to be a mechanic to get the joke?

Ok, what are those?

Sorry, I don't know what that stuff is, except I'm sure he doesn't want it in his tool drawer.