Bastex Electricians Grade Insulated Screwdriver 8 Piece Set. Anti-Shock Red Handled (1,000Volt) Complete with Mains Tester(100v to 250V Testing Range) for Electrical Work Household Usage GENERAL USAGE: This insulated screwdriver set is most often used in small electrical repairs. Residential Home, Auto, and even Electronics. Some of the most common repairs you may find this useful for are electrical outlets. Useful in many renovation and repair projects from contractors to the general handyman. Many cable installers use these types of screwdrivers for wire installation. It always a great idea to have these handy during automotive electrical repairs as well. PRODUCT FEATURES: RED High visibility handles. Insulated with dual layer protection consisting of a rubberized inner material with a heat and impact resistant exterior coating. Insulated to help aid in protection from electrical shock up to 1000v (volts). Great for general repairs. Package includes a mains tester that has a 100v to 250v testing range ability. DURABILITY: Not only is the plastic exterior coating high temperature resistant but in addition it provides a generalized weather protective coating. In addition, black oxide coated blades help aid in preventing rust while steal composition provides durability of the blade heads for lasting usage. Each screwdriver is a single contained unit connected at all points, adding increased strength and protection for all you basic electrical repair needs.