This set is made from SS304 and contains 1 large and 3 small actuators. These actuators are suitable for 4mm thick face faceplates and enclosure walls . The back of the actuator has a pin which can be ground down to the desired size. Simply drill an 8mm hole in your face plate for the large actuator and 5mm holes for the small.
Note: To use on DNA C boards an edge on the lip will need to be ground to fit side by side.
Here is an example mod made by Matt @ FyneMods using a 4mm small actuator set