The quality of connections is supper 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, including ArduinoQuality certified; Fit for 21-32 AWG (0.2 - 0.7MM) wireRetain perfectly the DIP switches, 7-segment, tactile switches, certain ICs, displays, or other devices even with leads shorter than 3.5mmComponents Features:1 pcs 830 tie-points breadboard (Full-Size)200 tie-point in 2 power rails, 630 in a matrix of 10 x 63. White ABS plastic, with black legend. Colored power rails with 2 split power buses. All pins are spaced by a standard 0.1 Inch. Perfect for straddling a DIP package over.The boards also have interlocking parts, so you can hook as many together as you?d like.It can be used for fast prototyping of electrical and electronic circuits without any soldering.2 pcs 400 tie-points breadboard300 tie-point (30 x 10) IC-circuit area plus 4 x 25 tie-point power busesWhite ABS plastic body with black printed legend. Color legend on distribution strips. With self-adhesive tape on the backWith interlocking parts6 pcs 170 tie-points Mini Breadboard (Mini Modular)Great way to prototype your small projects and a new look with colored mini-breadboard. 2 columns of 17 x 5 6 colors: red breadboard, blue breadboard, yellow breadboard, green breadboard, white breadboard, black breadboardWith self-adhesive tape on the back, make it easy to stick on the Arduino Prototype Shield.They?re also great for breaking out DIP package ICs to jumper wires!