In a previous video ( • Adjustable-jaw Pliers ... ), I showed a few different designs of adjustable-jaw pliers -- all of the ones in that video had some variation of flat-jaws that lend themselves mostly for use with fasteners (hex head bolts/nuts, square nuts, etc).
In this video, I focus on adjustable-jaw pliers with differently-shaped jaws - specifically for use with small-diameter round things (usually threaded pipes), in this case.
But if you need a tool with a little more 'grunt', you probably want a proper Pipe Wrench: • Pipe Wrench Basics - w...
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Channellock "Parrot Nose" #410 pliers (shown): amzn.to/3e7Tkgl