I'm installing a Blanco single handle kitchen faucet. This faucet is tightened by a big nut, about 2" or so. And the space is very tight also, there is only 3" - 4" between the sink and the back of the cabinet. I tried with a basin wrench, but it didn't work. 2" seemed too big for the wrench to...

Hello All! I purchased a T151 brasscraft basin wrench today. There are no directions on how to adjust the head. There's a small hole in the side which I suspect is used to release a pin, but I can't figure it out. Thanking you in advance.