BEST Mini Magnetizer Demagnetizer for Ephemeral Magnetizing or Demagnetization on Screwdrivers Tweezers etc Put the screwdriver or Tweezers into the "+" marked space to get a Magnetizing up in 2-3 seconds, Or "-" space for Demagnetization Please be aware this small Magnetizer Demagnetizer can just supply a weak magnetic power The out-looking on this set is not so beautiful since it is a cheap version,but useful convenient 2 colors,one is Green,the other is Blue,we will ship the parcel on Random Color,please be aware!