Blu-Mol Xtreme Phillips #2 X 1 in. L 2 pc Impact Insert Bit Set S2, are designed for use with impact drivers and drill drivers. When industrial-grade cutting is needed, Blu-Mol Xtreme is the choice of professionals whose jobs depend on success. From bi-metal demolition blades to patented hole saws Blu-Mol Xtreme products are designed for ultimate performance. Constructed with S2 modified steel for maximum durability.