I used a straight blade, but really you can use any pointed blade. and i just hit it a few times on the back (inside) to break the rust loose, then just hit the outside in like 3 or 4 places around the outter ring and it popped right out (towards the middle of the car). you just want to be careful to just hit the metal ring the bushing is in and not ding up the knuckle too bad. I have some air tools i used to clean up the small marks i made with a grinder. still way easier than burning and hammering by hand. cheers