Not sure if iFixit Narwhal driver is meant to be magnetic...

I recently bought the iFixit Narwhal 6-in-1 driver and bit set, and I've been loving its versatility so far! One thing I'm quite confused on however (that I'm not finding answers for online as well), are the bits meant to be able to hold screws magnetically? I'm getting mixed information about what part of this driver/product is magnetic, and the screwdriver I have doesn't hold the screws magnetically - more specifically, if I flip the bit holder to the smaller end and use the smaller philips bit, screws do ever so slightly stick to that bit magnetically but its so weak that the screw just falls off, and using the larger end of the bit holder results in no noticeable magnetism. Can someone clarify this to me? Thanks