Tri-Wing screws are commonly used in avionics, but you will also find them on the heads of bolts, and panel screws. These bits are drop forged and tempered to resist wear
SPCT100A
E25A
2EM
CR3243-4-7
CR3213-6-7
012-30
CR3243-4-8C
CR3213-6-7C
012-40
CR3213-6-8