Bosch's innovative P2+R2 bit geometry allows users to drive Phillips (P2) and Robertson square drive (R2) screw heads. These two-in-one bits are made of high-quality S2M tool steel for longer bit life. Bosch P2+R2 bits are DIN/ANSI rated to meet US and European standards. Made to withstand the high-torque ratings of today's drills. Bosch quality and value.