It's a small screwdriver for bit. You can use a magnet to maintained the bit in the screwdriver.

On the profile with magnet, you have a pause at layer n°69 to put your magnet :

You can choose to print a screwdriver for 4x2mm or 6x3mm magnet.

If you want use this tool with no magnet, you can find another profile who the hole for bit is resized to maintained it without magnet.