Global Specialties Premium Proto-Board solderless breadboarding systems continue to be the industry standard for quality, durability and reliability. Global's high quality plastic sockets with nickel-silver contacts are mounted to either anodized aluminum, or high-impact plastic back plates. Non-skid rubber feet and color-coded binding posts are included for the ultimate in utility and versatility. Global's premium Proto-Boards have tie point capacities ranging from 840 to 4560 tie points (PB-105 is the largest externally powered solderless breadboard available). Use Global's Proto-Boards to design test fixtures, perform lab experiments and in all areas of custom electronic design applications. Read Less...