Electric Tool Set: To ensure safety when working on live parts, it is necessary that no standard, non-insulated ¼” bits fit into the bit holder. VDE Tool Set: Electrician Tools: Each tool is individually tested at 10,000 V AC and approved for 1,000 V AC. Perfectly suitable for electrical applications in the electrical field. Bit Set: Deep-seated screws or hard-to-reach areas can be effortlessly accessed with the up to 33% slimmer screwdriver blade. Electric Tool Set: Space-saving due to the extensive interchangeable bit system and replaceable socket inserts. Tool set with insulated blades and VDE certification: Provides maximum safety for any electrical application up to 1,000 VAC. Tested according to IEC 60900:2012.