I grew up around garages and dad and myself have 3 sizes each. The swivel one can be handy at times ,and one with the anvil built in on the back over the inner column for beating small things on and a couple different sizes are options to keep in mind. You want one with replaceable jaws so you...
If its closed tightly place a chisel on edge (vertical edge) and tap towards the pin.The clips will open some. Then put a screwdriver in and twist towards pin . They open pretty easy for us.
Dad and I built a jack post attachment. It had 1" tubing on sides welded to a flat plate and a bottom post. We would pull the circular plate out of jack and drop this one in the hole,straddle the ****** pan sides along the bolts .Easy to make and use same jack. There are ones you can buy or make...