The three grades of cabinets are stock, semi-custom, and full-custom. Stock cabinetry is what you find available, sitting on a shelf at a box store, ready for you to take home and finish. Semi-custom cabinets are most commonly made to order and available in an increased range of sizes, door styles, finishes, and box optimizations. Full custom cabinetry is often created to exactly fit the available space, without the use of fillers and the specifications of the client.