There are several blocks called Monkey Wrench – this one is sometimes called Snail Trail and is essentially a 4-patch within several squares, so we’ve added it to the blocks associated with the Square-in-a-Square tutorial.
Just set on its own this two fabric block can look a bit so-so . . .
but turn alternate blocks around and you get the classic Snail Trail pattern.
But what if you add another colour?
The quilt could then look more like this
Or add yet another colour
which gives you more opportunities for playing with the arrangements
or this – which reminds me of waves breaking on the shore
or this (which looks more like arm wrestling!)