2.5mm domed or 2.5mm flat (Hard to know what made them chose one style over the other for certain models)

 Some of The Glass Breakers had holes on them which could be removed by inserting something like an allen key or a punch and turning. Some Had torx screws to hold the clip on.

Med Triangle chassis screws.

Large Triangle (UT Glass) for the glass breaker.

Med Triangle chassis screws.

Large Triangle (UT Glass) for the glass breaker.

The Jimping on the sides of the handle changed

Med Triangle chassis screws.

Large Triangle (UT Glass) for the glass breaker.