@OM2
with the makita the screw bit goes in quite far into the magnetic slide which has a magnetic ring at the end
the screw contacts the magnetic ring just before it is fully engaged on the bit...so the magnet 'pulls' the screw tight against the magnetic ring...
you can hold the magnetic sleeve as the driver/drill starts the screw without tearing your fingers..just push down gently on the screw and fire the driver...and bang!! its in flush as the sleeve also acts as a dead stop
i use it for everything...never gives me any trouble
and as mentioned the screws have to have a carbon content (ferrite as martensite) as for steel to react to the magnet
brass and the common stainless type dont seem to be possible
"A common misconception is that stainless steel is non-magnetic. There are five classes of stainless steel, and only one is non-magnetic. However, it just happens to be that the most widely used type (austenitic) is the one that is not magnetic."
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if there is a better one and this lets me down...i will buy that one!!
cheers
geof