Features2 x 830 point + 2 x 400 point Solderless Breadboards (630 tie-point ic-circuit area plus 2x100 tie-point distribution strips providing 4 power rails)Convenient for the prototypes and circuit design experiment and other DIY projects. Perfect for Arduino, Raspberry Pi, and other programming boardsSelf-adhesive tape on the back, make it easy to stick on the prototype shieldABS plastic body with black printed legend. color legend on distribution strips.No wobble. The components will sit well after assembly due to tight plug-in contacts.