This is certainly not suitable for US guitars such as Gibson.
The one delivered to me was one with a small bore.
I had to drill it further with a larger drill to a diameter of 4mm and the beginning of the hole even to a diameter of 4.5mm.
Then I could use this toggle knob on a US Gibson guitar.
The material from which this toggle knob is made is quite good, but it is certainly not a version with a large hole for American switches.
I suppose that in its original condition it might be useful for Gibson copies from the Far East such as Epiphone, etc ...
A switch tip with a vintage vibe! great color. The only problem is that it does not fit Switchcraft switches immediately and does require some sanding. Otherwise a great product from Göldo!