tools "one shot"

Maybe considering the price it should have given me the chip in the ear, but all plastic levers are broken one after the other while I was trying to separate the shell from my Note 1.
When I finally opened the shell, and although I respected scrupulously video tutorial, all plastics levers were broken, because too little resistant material.

Screwdrivers when with them are sketchy (there when the game is unscrewed), it works, but only just

=> It's good for the one shot, but no more