Purchased these a while back, just got around to installing them.
Made an enormous difference over the stock P Bass machine heads, these just feel sturdier and the gearing is really smooth. Installation was a breeze, took about 30 minutes in total. This set comes with the bushes but I kept the original Fender ones which were already in my headstock as it seemed pointless removing them, saved removing them and possibly damaging my headstock.
Highly recommended.