Tether Ready Insulated Screwdriver Set #1 #2 1/4 in 3/8 in Slotted Square Ergonomic 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