There are 3 common shaft lengths 2 of which are sold as "short shaft" and 1 that is sold as "long shaft"
The 3 lengths are
- 1/4" tall bushing for use in pickguards and controls plates (shortest shaft)
- 3/8" tall bushing. These will work in warmoth rear route cavities in my experience but you may have to lose a washer or two and maybe scrape some paint out of the way. (short shaft)
- 3/4" tall bushing for les pauls and such (long shaft)