Screwdriver ERGONIC, VDE Length : 80mm Blade diameter (mm): 5 Handle (mm): 94 x 30 What is a VDE screwdriver? A VDE screwdriver is used to ensure you are safe when working with electricity . Red handles ensure easy identification against your other tools. VDE stands for Verband der Elektrotechnik, who is responsible for testing and certifying tools and appliances.