The present invention includes a system for quickly and simply manufacturing semi-custom cabinetry utilizing a hidden pin joining system. The hidden pin joining system allows panels of the cabinet to quickly and securely join together, with significant load bearing ability. The different joining pin designs allow for different ways of discretely joining pieces together to create custom cabinetry during installation. The specially designed drill bits allow the system to work seamlessly. Using CAD/CAM machinery, the drill bits can cut stock pieces that can be taken to installation sites, and formed into custom cabinetry for kitchen, closets, or any other desired shelving units.