Socket Cup Point Set Screws (also called Hollow Point Grub Screws) are Contoured with a concave cup point, which ensures a tight fit against a rounded surface for example, a motor shaft. Cup Point Set Screws are integrally designed to withhold in place with pressure from the tip. Their distinctive cup point tip enables the set screw to prolong a feasible state when clamping in contrast to the other available set screws.