I have used these on some of my Billy Bookcases and they are perfect. However, these are the older Billy Bookcases where the original support was a cylindrical bar 5 mm in diameter. They are not suitable for the newer Billy Bookcases with the pressed metal support as these only require a 3.3 mm hole - unless you want to drill the hole out of course.
Answered by: NeilVP
Date published: 2020-12-07