What makes the Premium screw easier to start?

The Premium inner nut has a wider lead-in chamfer and less movement inside the cage. Its screw thread also feels noticeably smoother in use. Together, those details make it easier for the screw to locate and begin threading cleanly.

It is a small piece of hardware, but anyone who has tried to hold a rack unit in position while persuading a reluctant screw to find a wandering nut will understand why small details acquire sudden importance.