If you are replacing them, yes, you don't need the tool but if you are taking them out and then later reusing them, then a tool would help to prevent accidental tearing of the boots.

You can pick up one for about $20 at most Autoparts stores.

http://www.nextag.com/BALL-JOINT-REMOVER--zz71815304zB2z2--COMPARE-PRICES-html

"Always do the cheap and easy ones first." 1996 V6 ATX 96K miles