This is a cool touch. When I received it, I couldn't quite understand it. I knew I would need a crowbar, but there were no instructions. The first time I tried to use it the technical mind kicked in and it was simple and effective. Use a long pry bar, strong bar or tube at least 1.5 times the length of the lower arm. Instructions: 1. Remove the ball joint nut (or loosen it if you don't have space) and remove the ball joint stud from the steering knuckle in the usual manner.2. Hang the hook on the lower control arm (the hole should be at the bottom. The side you choose will depend on the shape of the arm to give more leverage, but it will work on either side if you follow step 3 correctly follow). 3. Insert a pry bar (or strong bar/pipe) through the hole.4. Make sure the other end of the pry bar is properly connected to the inside of the lower arm to prevent it from slipping off.5. Pry open the handle of the pry bar until the ball joint pin comes out of the steering knuckle. (If there was not enough room to remove the ball joint nut previously, unscrew it completely at this step until you can lower the control arm sufficiently.) 6. Pull/push the knuckle away from the ball joint while pressing the down maintain directed force on the lever bar. When reinstalling the lever on the knuckle, follow steps 2 through 5. This is a one man job and no more slippage will occur! I was going to buy another tool, it's very long and several times more expensive, but I decided to try this one first. Buy it!