This economic series switch and socket similar as Legrand's light switch and socket. 

We use durable rubber band to fix sharp mounting claws,if the claws is not sharp enough which can not hold the wall box;

all cooper parts for switch and socket we use high grade copper so as to make sure good electrical conductivity;

all plastic parts for light switch and socket we use quality PA and PC which have high Anti-Flaming, high temperature resistance, pass  850℃  Glow Wire Test