Quote Originally Posted by dhickey View Post
Cab - I also used a 3/8 wrench for these plugs. You sure you have the right size in your document?
Yes, a 7/16" closed end or boxed end wrench (see below) fits perfectly on the squared headed plug. And it sounds like a 3/8" open wrench fits it too. I prefer the boxed end wrench as there is no chance of slipping and possibly rounding off the corners of the square headed plug especially if the plug is stubborn and requires a lot of force to break free. But either one will work.