If you aren't wanting to spend that much for the tool a ratchet strap does the same thing for less money. Just watch as you are tightening so you don't tighten it right into the radiator.
i bought mine from snap on and it was like 35.00, good lord do the job right with the right tool!!! its well worth it. plus a strap can cause you physical damage if it snaps DO IT THE RIGHT WAY THE FIRST TIME