Attributes . Set of 6 pieces. High-endurance transparent fluted plastic handle. Micro-alloy steel shank offers maximum durability and resistance. Black tip prevents chrome particle shedding. Exceed ASME B107.600, ISO 2380-1 & ISO 8764-1 standards. Square shank allows you to use a wrench when extra-torque is needed. Screwdriver sizes: Slotted: 1/4? x 4?, 1/4? x 6?. Cabinet: 3/16?x 3?. Phillips: PH1 x 3", PH2 x 4?, PH3 x 6?. . Names