3M 300 Series Solderless Breadboards. 3M 300 series solderless breadboards incorporate state-of-the-art techniques to yield a circuit building system with unparalleled flexibility and reliability. A voltage distribution system is integrated with the basic component breadboard matrix. 5-way binding posts provide the interface for connections from the power supply, signal generators or other external equipment. Features and Benefits:. Quick to use and all components can be reused Easy identification allows for fast layout designs and project applications Metal base plate helps minimise noise and voltage spikes in high-speed circuits