This protoboard is the perfect tool for quickly prototyping an electronic circuit or turning a breadboard prototype into something more permanent. These boards are completely lead free and made from high quality FR4 which can withstand high temperature soldering and re-work. The holes on this prototyping PCB have a standard 0.1" pitch to enable compatibility with a large variety of electronic components. The space between the power rails and the adjacent rows is 0.15". Each hole is electrically connected to a row of holes to make building circuits fast and easy. See the drawing below for a detailed view of the electrical connections on this board. Both sides of this board have solder mask, making it easier to control solder flow and prevent unintentional bridges.