One tool? or TOOLS?

I needed to get a 3/4 inch wrench to tighten up the bolts for the railing posts on my deck. I had some options... One wrench for $11 or 11 wrenches for $20! [Note: The set was on sale. Same brand. Same shiny 3/4 inch wrench. Same "lifetime commitment" (as the advertisement above them claimed... I should have taken a picture of the ad)].

This? ($10)

Or these? ($20)

Needless to say, I have a lot more wrenches.