This reference is a full plastic screw with a total thread. It is an in-house reference and therefore exclusive. Bülte 4-point screws are perfectly suited for hand-held use because of their star shape.
No need to look for a wrench. The PLAS 71 4-leg screw allows free-hand screwing without tools, which makes it easier to tighten and loosen the part.
It is often used in industry, aeronautics....