The Thomann package was delivered really fast and without any damage.
I wanted to change the look of an old guitar of mine so I used those amp knobs for a guitar. Installing them was easy, there's a small screw on the side to fix it.
I really enjoy its shiny surface and the black rubber in contrast to that.
The grip of these is great, even with sweaty hands on stage there is a good grip to keep your volume and tone under control. To those, who are looking for a good, grippy knob I recommend the Tube Amp Doctor Amp Knob British Style!