The Global Specialties Quick Test (QT) solderless bus strip sockets offer expandable, reusable breadboarding areas that bring ideas from conception to a working circuit quickly and conveniently. The QT series offers a versatile system that can be used for any kind of analog or digital circuit design or experiment. Global's unique molded tab and keyway construction allow for unlimited circuit size and molded-in mounting holes permit each socket to be mounted from either the front or rear of the socket. Each socket is made of durable polystyrene and nickel-silver contacts for the highest quality circuit connections. All QT breadboarding sockets come with a heavy-duty Mylar backing to prevent short circuits. Available from 60 to 100 tie points. Read Less...