Blu-Mol Xtreme Phillips #3 X 1 in. L 2 pc Impact Insert Bit Set S2, high torque, long lasting bits compatible with impact drivers. When industrial-grade cutting is needed, Blu-Mol Xtreme is the choice of professionals whose jobs depend on success. Constructed with S2 modified steel for maximum durability. Black finish, with contrasting color coded bands allow for easy identification.