For different reasons, the hexagon of M2 allen grub screw are not always equal. Some are larger than others and cause a major problem among all fans who use them.
All have experienced that the tip commonly used in the wheel screw X "dance" on the wheel screw Z. The new interchangeable "Big Tip" can be used in all M2 allen screws where the tip of the 1.3mm does not fit precisely and is loose-fitting.
