The Global Specialties PB-5 is a replacement breadboard socket for use with PB-507 Advanced Analog and Digital Electronic Design Trainer. The PB-5 has a removable breadboard consisting of 4150 tie-points secured to an anodized aluminum back plate for strength and durability. PB-5 lifts on/off the PB-507 by attached stems. Having multiple PB-5's enables many students to share the same PB-507.