Below is a picture of a Power Steering Pump the same as the one in my car. I am trying to pick up a pulley but the ones I see for sale are listed as "Press Fit or "works with a keyway". What does it mean works with a keyway. Which one is the below pulley can anyone tell me.

Thanks.

 

all the ones that I've seen are press-fit, a key way means there is a grove in the shaft and on the pulley that a small flat rectangular or half circle shaped piece of metal called a "key" fits into, that joins the shaft and pulley together, a good example is the end if a crankshaft, there is a "woodruff key" (half circle one) in it that fits into the crankshaft, and then into the timing gear and the harmonic balancer.

 

Thanks for the explanation.