Innovative additions to existing cabinet doors can keep chef knives and cutting boards close at hand, without cluttering your countertops. Having convenient and safe access to knives is essential in the kitchen. Standing knife blocks can take up valuable kitchen counter space or be difficult to use if you have low upper cabinets. Often they do not have enough room to contain all the knives either, which means some may end up loose in a kitchen drawer. This knife block can be customized for all your knives and is hidden in a space that is otherwise unused. Both of these handy retrofit ideas can be added to traditional cabinet doors, or they can be hinged to fold down, as shown below, allowing for easy access and dust-free storage.