The quality of connections is super consistent.The contacts are perfectly aligning with the holes; NO power fluctuation across the boards; Wonderful selection of the breadboards which fit to various electronic DIY projects and electrical experiments; Fit for 21-32 AWG (0.2 - 0.7MM) wire Retain perfectly the DIP switches, 7-segment, tactile switches, certain ICs, displays, or other devices even with leads shorter than 3.5mm Components Features: 6 pcs 400 tie-points breadboard, 300 tie-point (30 x 10) IC-circuit area plus 4 x 25 tie-point power buses White ABS plastic body with black printed legend. Color legend on distribution strips. With self-adhesive tape on the back With interlocking parts