The PSI rating on super glue is mainly a marketing hype.
The use of cyanoacrylic glues ( super glue/hot stuff) for attaching handle scales to a metal tang is not as good as using a quality slow cure epoxy. There are several reasons for this, including moisture degradation, life of the bond, and brittleness of the resin. a 24 hour curing epoxy is the best to use. Accraglass is a brand that is used by many of the best knifemakers.
You didn't fill out your profile yet, but I'm guessing you are from Italy or lower Europe?