All tuning machines work great with some light wear. They include all installation hardware.
Set of 4 closed back tuners, 4 in line. These came from a 80's Squier bass -see pictures. Looks to be approx 7/16th inch hole size. $15 shipped USA
compare to standard Fender tuner
SOLD Set of 4 Gotoh GB7 tuners, 2 left, 2 right. $30 shipped USA.