Breadboards allow you to easily assemble and test circuits without the use of solder, providing you with a quick and reliable method of prototyping. Electrical connection is made by inserting your component lead through the 0.1+ spaced holes to the spring clips mounted on metal strips within the ABS plastic board. These strips provide a common electrical connection so additional components can easily be added. This bundle includes a breadboard wriring kit containing 70 jumper wires. Each jumper has stripped ends and preformed right-angled leads for easy insertion into your breadboard. It ensures your breadboard prototype has an organized and tidy appearance.