An impaktor bit set containing the premium tritorsion system bit holder with an optional ringmagnet to securely hold screws up to 10quot also a held in the compact case are patented diamond coated anti cam out screwdriver bits that are specifically designed for cordless impact drivers and suited to the heaviest duty jobs the tritorsion system means the bit and bit holder have been precision hardened to allow the metal to flex in controlled areas and absorb the stresses applied by constant u