Tether Ready Insulated Screwdriver Set, #1, #2, 1/4 in, 3/8 in, Slotted, Square, Cushion, Number of Pieces 4, Yes, ESD Safe No, Non-Sparking No, Measurement Type SAE, Corrosion Resistant Yes, ASTM F1505-10, CSA, IEC EN DIN 60900, NFPA70E, OSHA, UL Listed, Tether Ready Yes, Range of Shank Lengths 10 13/64 in