Yes. Without a mat or other surface on them, they are as hard as whatever they are stuck on. I have users who have thick rubber mats on them. The FSR is force sensing so the mats even out the force and make them much more "playable" - more subtle force levels are detected. They are a must-have for sticks or other hard hitting.
Thank you! we specialize in controllers and performance modules. Modules that help when the "spaghetti" of patch cords gets to dense to easily put your fingers through to tweak.
The arcade button modules uses true pinball machine buttons and would not work with your rig because they are designed for the wooden sides of pinball machines and are over 2" deep! they have a great bounce-less action though using common micro-switches which can be swapped out for different "feels".