Magnetic Screwdriver Bit

screwdriver bit
A hex shank with a screwdriver tip at one or both ends to loosen and tighten recessed screws; designed for use with magnetic or power-driven screwdrivers

magnetic
Capable of being attracted by or acquiring the properties of a magnet
Relating to or involving magnetism
of or relating to or caused by magnetism; "magnetic forces"
Having the properties of a magnet; exhibiting magnetism
having the properties of a magnet; i.e. of attracting iron or steel; "the hard disk is covered with a thin coat of magnetic material"
capable of being magnetized