For the last time, go to the blue mat with the number 3 on it. Jump to grab the crevice in the pillar, then the next one above. Again, traverse around the corner to the right.

Jump to grab the upper crevice and jump back to grab the crevice behind you.

Traverse around the two corners to reach the metal ledge.

Jump to grab the next metal ledge on the right.

This time jump to grab the horizontal pole behind you.

Swing and jump to grab the next pole (the one you rotated before).

Swing and jump to grab the vertical hanging pole. Turn left and jump to grab the next hanging pole.

From there, jump to land the first taller vertical metal pole, then to the next one. Jump on the ledge and pick up the Wrench.