Set of 7 screwdrivers. Exclusive steel-lined orifice allows the user to apply torque to any object without damaging the handle. Black tip prevents chrome shedding. Square shank allows the use of wrenches. Resistance to flexion improved. Exceed ASME B107.600, ISO 2380-1 & ISO 8764-1 standards. Ergonomic two-component handle: red for high impact and black anti-slip. Double heat-treated steel cap. Striking area joined to the screwdriver’s shank, providing the best performance when hit. Screwdrivers sizes: 1/4″, 5/16″, 3/8″, PH1, PH2, PH3, PH4.