These tuners were an easy swap out for the broken ones on an old Squire guitar.  I was also changing from nickel tuners to these black ones, but the ferrules are plastic and poorly made.  There's no way I am putting plastic ferrules on any guitar, no matter how inexpensive it is.  So I ended up with black tuners with the original nickel ferrules.  Also, you may want to put a small dab of grease on the gears before you mount them - they come unlubricated.  Don't expect these tuners to last very long, they are made of cheap, flimsy pot metal and won't stand up to any form of abuse.