Knob for M4 Hex Head Screws

So my dad has this hand saw on a long stick, wich uses m4 Screws to hold the Sawblade. He lost one Screw and wanted to replace it with a regular M4 Screw, so I designed this knob (wich is stuck and then glued onto a M4 Hex Head Screw) so he could adjust his saw without needing any tools.

I used PLA and glued the Knob onto the Head of the M4 Screw with Super Glue (CA).

Print it so that the part where the screwhead goes is on the upper side, to avoid using supports.