The 922309 is a Solderless Breadboard incorporates state-of-the-art techniques in design and fabrication to yield a circuit building system with unparalleled flexibility and reliability. A voltage distribution system is integrated with the basic component breadboarding matrix and 5-way binding posts provide the interface for connections from the power supply, signal generators or other external equipment. It incorporates the 3M laboratory-proven multi-tie-point terminal design for convenient, solderless, plug-in circuit building. Each terminal position contains electrically connected tie-points spaced on a continuous 0.1-inch matrix to accept any component with 0.1-inch lead spacing as well as components whose leads can be dressed to fit. The surface of the steel base is high gloss baked enamel for protection. Rubber feet prevent sliding during benchwork.