The crisp black row/column numbers on this board - legible at a glance - help you keep track of complex circuits. The power rails are clearly marked with red and blue stripes to denote positive and negative rows. Interlocking tabs allow multiple of these boards to snap together into arbitrarily large panels. The power rails can be unlatched from the central module and rearranged to suit your project. These boards are made from a hard tough plastic that will withstand years of abuse. Peel off the waxy backing sheet to reveal an adhesive foam layer that will solidly mount this board to any surface.