I need some help on modeling a philips screwdriver head like this one, I need some ideas.
The main shape is a hex cylinder, start with that: cylinder with six sides. You’ll need more than six sides to model the circular parts, and the screwdriver head has to have four blades, so divide each side into four segments with the loop cut tool. That will give you 24 vertices along the edge, which is plenty to make a nice circular cylinder for the shaft near the head and for the indent.