Rogers Internal Tone Control

This is the best damper I have ever used, it is perfectly designed and engineered and although it doesn't come with any instructions, I asked for some help with this and was sent very promptly
a photo of it fitted, which helped a lot.
The only downside is that it can't be fitted to a 5.5 inch metal snare with a centre reinforcing bead as there is a flat plate that is fitted to the outside and the damper needs to be fitted in the centre of the drum exactly where the bead would be.
However, perhaps Rogers may only expect it to be used on Wooden Drums.