The basin wrench you linked to would be the right tool if the hex nut was 1 or less.
Tool to tighten nut under sink.
With the flashlight you need to locate the nut that secures the faucet in place.
Fit the head of the wrench around the faucet mounting nut so the ridged jaws of the claw grip the notches or edges of the nut.
The short reinforced body not only clears spaces but is easy to store.
In the photo here the head is positioned for loosening the nut use the t bar at the end of the basin wrench to turn the shaft and loosen or tighten the nut.
The ez change faucet tool is a multi purpose under sink plumbing tool that works on most faucets.
Set your wrench to the correct size.
Remove faucet nuts with a faucet wrench.
Remove and reattach the ratchet handle as you rotate the nut.
Abn rigid basin wrench extendable faucet installation tool telescoping plumbers under sink telescopic 3 8 to 1 3 8.
Close up of the faucet wrench.
If the sink p trap is in the way remove it by unscrewing the nuts.
But to use the wrench you would need to first remove the sink from the counter.
Operating the basin wrench.
This lightweight tool with durable aluminum inserts handles many aspects of faucet installation including shut off valves supply lines and basket strainers.
Find plumbing wrenches specialty tools at lowe s today.
How to tighten a nut under a new sink fixture.
Slide the open end of the faucet wrench over the supply tube and push it up to the faucet nuts.
Clear off the shelves under the sink to give yourself more room to work.
For a larger nut like this it was designed to be either hand tightened or with a wrench like the channel lock or adjustable wrench you linked to.
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Seven sparta 8 in 1 faucet and sink installer multifunctional faucet wrench removal tool for toilet bathroom kitchen sink faucet basin pipe nut plumbing red 4 0 out of 5 stars 240.
Slide under the sink on your back next take the flashlight and slide under the sink on your back.