Fesa Insulated Hex Key Set - 1000V 7-Piece Professional Metric Hex Key Set With Rigorously Safety Tested Certified ? All FESA insulated electrician tools are flame-resistant tested up to 10,000 V AC rated to 1,000 V AC for your protection on the job. Every insulated hex tool set is VDE GS certified meets the IEC 60900 standard Perfect Fit Into Hexagonal Sockets ? By design, hex keys provide maximum torque a secure fit when inserted into a hexagonal socket screw, helping prevent cam-out, stripping screw rounding. FESA insulated hex tools are built to handle the toughest of jobs in any industry Tailored for Safety Comfort ? Made for the demands of electricians, industrial technicians, mechanics homeowners alike, the insulated ergonomic handles provide a comfortable, fatigue-free grip for prolonged work protection against electric shock Tough, Durable S2 Steel ? FESA insulated hex wrench set is made with solid S2 steel, known for its superior hardness wear resistance, making it less prone to deformation under consistent use 7 Common Metric Hex Keys ? This FESA insulated tool set includes 7 of the most common insulated metric hex key sizes: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm 12mm. A foam tray (15.5" x 9.25" x 1.5") to house the tools is also included