Megapro PL Robertson Screwdriver is created with special double end bits by PL Robertson. These bits are designed to be compatible with most Megapro drivers. All authentic Robertson Tips are manufactured from a specially modified tool steel and carefully heat treated to provide maximum wear and torque. Bit load consists of SD0-0 yellow, SD1-1 Green, SD2-2 Red, SD3-3 black, PD1-2 phillips, PD0-3 phillips and FD4-6 Flat (slotted). The Robertson bits are color coded for eay bit size identification.