It's a Carpenter Thing You Wouldn't Understand
The plain carpenter design of the three.
4 designs of the same line, so you can pick the artwork rather than settle for the first one you find.
The plain carpenter design of the three.
Leans toward the construction site rather than the workshop.
The third carpenter layout, same price as the others.
Another carpenter layout at the same price as the rest.
Trade and profession shirts are specific on purpose. Someone who says they are a carpenter will not accept a near-miss title, and the closely related jobs each have their own version — that precision is the whole point of the joke.
The 4 designs here all name the same job, so pick on how loud the artwork is. Anything worn to work should read cleanly at a glance rather than crowd the chest with a second punchline.
Best for someone a few years into the work — long enough that the job has its own vocabulary and its own complaints. For a new starter it can read as presumptuous, and for someone who has left the trade it reads as nostalgia rather than a joke.