AGPtEK Insulated Electrical Screwdriver Phillips and Flat Double Head Precision 7pcs Set Black Finish Blades With Magnetic Tips Home Outdoor Repair Tool Kit Cr-v steel with heat treatment, high hardness and good toughness and resistence Black finish blade with magnetic tips which could conveniently attracts screws Plastic blade cover and special material which makes it durable and not easily broken down With ergonomic TPR handle and button on it, it helps you to use very easily Insulated blades for Electrical applications. Workingvoltage:500v