'Channel-Lock' pliers can open up to a range of specific settings, so the jaws get wider and wider.
Tongue in groover type pliers made by the Channel Lock Inc tool company of USA.
They can pinch you.
10" channel lock
Channel lock pliers are very versatile. My main use of them is for holding large and awkwardly sized objects, for instance, clearance trap nuts under sinks.
You cant, it needs a 'C' clamp.
A pair of pliers with large gripping jaws of semi circular shape. They often have a channel lock joint .
There are electricians straight pliers, wiring pliers, long nose pliers, angled long nose pliers, side cutting pliers, parallel jaw pliers, locking pliers, aircraft twist locking pliers, channel lock pliers, oil wrench pliers, water pump pliers and fencing pliers. -I have each of these and I'm sure there are many more kinds.
with pliers
You need a pipe wrench. Try to borrow-they are pricey.
I use a "C" clamp but a big set of channel lock pliers works good too.
with pliers
At most stores slip joint pliers cost between $15 and 30 . If you care about tools go for a Channel Lock Plier at Home Depot. A little pricier, but a quality tool.