It's often sold in automotive or plumbing, and is your answer as to how to unscrew a huge pipe, lid, or piece of plumbing. Ask your hardware store.
You can use it to screw on or screw off, just flip it. Every house should have one for that obnoxious giant pickle jar or a stuck canister for the ro/di.
You can use it to screw on or screw off, just flip it. Every house should have one for that obnoxious giant pickle jar or a stuck canister for the ro/di.