Channel locks will be your best friend on those.
Some warm them up to put them in the arms, and a pinhole in the bottom of each one for air to escape, and a touch of grease on each pin.
Use the channel locks and a short 5/8 or so socket to push them onto the pins if it helps, and good luck on the top one on the drivers side.
That one can be a little frustrating if you are doing them in the car and taking the cluster out is pretty much a must for the two on that side. :D
