The quality of the connections is extremely constant. The contacts are perfectly aligned with the holes; no current fluctuations on the boards. Wonderful selection of breadboards for various electronic DIY projects and electrical experiments, including Arduino. Quality Certified; Suitable for 21-32AWG (0.2-0.7mm) cable Store the DIP switches, 7-segment switches, tactile switches, certain ICs, displays or other devices perfectly even with cables less than 3.5 mm in length. Component features: 6 x 400 mounting points pegboard 300 terminal points (30 x 10) IC circuit surface plus 4 x 25 terminal point power buses. White ABS plastic housing with black legend. Colour legend on distributor strips. With self-adhesive tape on the back with interlocking parts