Number of items: 3 Product overview This product is a pack of three SPST single pole single throw knife switches designed as demonstration props for physics and electrical experiment teaching. They are intended to illustrate the basic principles of electricity and the working principle of simple circuits. These switches are for educational and experimental use only and are not suitable for daily electrical use. Key benefits Clear demonstration of circuit basics: Provides a simple on off mechanism to show how a single electrical connection is made and broken in a circuit. Designed for teaching and practice: Useful for classroom demonstrations, lab exercises, and hands on student practice to reinforce understanding of circuit behavior. Encourages exploration and creativity: Suitable for DIY experiments such as fruit battery projects, helping to develop problem solving and practical skills. Convenient pack size: Three identical switches allow multiple students or groups to work simultaneously or to components during experiments. Main features Type: SPST single pole single throw knife switch. Function: Makes and breaks a single electrical connection to demonstrate circuit open and closed states. Intended use: Physics experiment equipment and electrical experiment teaching. Not intended for continuous or everyday electrical use. Quantity: Pack of 3 identical switches. Use scenarios Classroom demonstration: Use the switch to show how opening and closing a circuit turns a simple load on and off during a live demonstration. Home science project: Include in a DIY fruit battery setup to connect cells and test voltage and current while exploring basic electrochemistry concepts. Lab practice: Provide students with hands on experience wiring simple circuits and observing the effect of switching on circuit continuity. Notes For educational and experimental use only. Do not use as a replacement for household or industrial electrical switches.