This is an updated screw of the one made by Intentional3D (creators of the Platform Jack - https://www.thingiverse.com/thing:925556). My platform jack's screw (printed in PLA) kept breaking as the knob was screwed onto the bottom. It would hold at first but then the screw would break after a long time of exposure to pressure. This design should prevent the screw from breaking at the pyramid portion on the screw. You can simply slip the knob onto the screw this way (glue advised). This makes the pyramid section sturdier.
You can use different filaments that fit you - ABS is a little stronger than PETG.