This is a low-cost, basic SOIC breakout boards. This custom PCB will interface a standard SOIC package IC to 0.1" headers, which are easier to work with and integrate well with breadboards.
There is DIP-standard 0.6" spacing between the two rows of pins.
40 Pin break-away headers are perfect for use with these custom PCBs. Machine pin headers may be a better option for IC sockets.