You can buy little cubes that will turn any non magnetized screwdriver into a magnetic one. You just kind of wave it through a hole in the center and bam, magnetized screwdriver. Then you wave it through another part and bam, back to normal. They’re like $5

Alternatively just get an earth magnet and stick it on the shaft. This creates a much stronger magnetic force, as while the above option works it’s not the strongest effect