• Single throw--suitable for teaching the basic principles of electricity and the working principle of simple circuits to physical performance,knife for electrical experiment
• Single pole knife--a for making and breaking a single electrical connection circuit, suitable for students' circuit experiment teaching,knife for physics experiment
• For physics equipment--this is great for homeschool DIY circuits and physics class disconnect electrical circuit experiments,electronic knife
• Single pole--easy to use and great learning tool for , intuitive teaching is sure to any student,spst for electrical experiment
• Physics experiment spst--provide accessories for physical circuit experiments, which will not leak and conduct electricity,single throw knife