WIRED WIND Analog Electric/Line Tester 813-Overview 813 Screwdriver / Line Tester is a multipurpose product that works great as a screwdriver as well as a line tester. The useful and appreciable tool is a must have in your toolset. If you prefer to do your own hardware tasks then this is a must have product for you. This awesome product is manufactured by WIRED WIND which is known for high quality tools and accessories. Utility WIRED WIND 813 Screwdriver / Line Tester is yellow in colour and is made of high quality iron. It will help you check if there is electric current in a particular wire or plug or not. It will also help you screw up screws and work as a screwdriver.. It has been consistently producing all the hand tools in India with the exact technology of its collaborators. The quality, the features, the looks, the packings etc., of thetools is continually improved and always appreciated around the world.