See how the 2 pins point downward? Like fangs? Yep, that's why I call this switch the Vampire Fangs Foot Switch.
Single Pole, Single Throw, Push Button Foot Switch. Normally Closed.
These are not "soft touch." They have a very sturdy click that springs back with pleasure.
The shaft diameter is 11.77mm. I use a 12mm bit to drill a mounting hole for these.