This is your tried and true half size solderless breadboard! It has 2 power buses, 10 columns, and 30 rows – with a total of 400 tie in points. All pins are spaced by a standard 0.1″. The two sets of five columns are separated by 2 columns with a 0.4″ distance between the holes. The board accepts wire sizes in the range of 20-29AWG. This board also has a self-adhesive on the back. The boards also have interlocking parts, so you can hook as many together as you d like.