this kind of screw heads protrude in the floor, and many could have external flanges, Though lots of retain the typical hex form.
The wings are offset and don't overlap at the center. they permit additional drive to https://caraodnu216747.activablog.com/27458243/how-much-you-need-to-expect-you-ll-pay-for-a-good-types-of-screw-heads