Description:1. Comply with 1000V2 high voltage IEC60900 safety specification. The clamping head is forged from professional alloy tool steel (S55C-1), which has a 30% longer service life than other materials. For cutting edges, it has passed special high frequency heat treatment with hardness HRC58-62, which can cut soft and hard wires.3. The screwdriver rod is made of 6015# chrome vanadium steel, the cutting edge is quenched and high frequency quenched, hardness: HRC52-54, the surface is treated with manganese phosphate4. The handle is made of TPE material, which meets the non-toxic requirements of PAHS and environmental protection. Normal use at low temperature-25°C±3 and high temperature 70°C. The two-color insulated with rubber handle is 1000V high voltage resistant and fire resistant.5. Multiple sizes and complete specifications can meet your different working needs.6. Screwdriver bits have a strong magnet that easily absorbs small metal components such as screws(Includes 110V-250V electric tester)Specifications:Material: 6015# chrome vanadium steelModel: VDE-9952, VDE-108, VDE-206, VDE-316Type: insulated screwdriver setHardness: HRC52-54Package Included:1*Insulated Screwdriver Set(or 1*Pliers)