Just be aware this will not work with some GM model cars and trucks as they use Pull hooks instead of bolts.
Most steering wheels have two holes threaded next to the center retaining nut or bolt for a puller like this.
You need to remove the horn pad or airbag on most cars first. Then You need to remove the retaining nut or bolt from the steering column.
Place the Black large threaded Shaft where the nut was after threading it threw the metal block,. Use the correct adapter on the shafts end so you do not damage those threads on the steering column.
Find the matching bolts for the thread size and pitch of your wheel, This kit includes 3 sets of two bolts. They match most cars and trucks but not all. They go threw the silver Block also, one on each side of the black shaft.
Hand tighten the two smaller bolts evenly until the block is level with the face of the wheel.
Then you Tighten the black threaded shaft using a wrench or socket as martin posted. It will force the block that is bolted to the wheel to pull as you tighten the shaft. it is important that the puller block stay level with the face of the wheel.