Protobloc AD Series Advanced Solderless Breadboard - K&H Manufacturing AD-102, A 456 tie point solderless breadboard that is ideal for prototyping and testing electronic circuits. As a prototyping system, Protobloc offers a fast and economical method of circuit construction and development. Components are plugged into the board and are retained by double leaf spring contacts, with positions clearly defined on an alphanumeric grid. Sockets are on a 2.54mm matrix, allowing all dual-in-line integrated circuits, plus many other components to simply be plugged into the board. Units can be clipped together to accommodate larger circuit designs and the solderless concept allows components to be used time and time again, making these boards an ideal system for the teaching of electronic systems and circuit design. K & H AD-102 Advanced Solderless Breadboard - 456 Tie Points