The simple, clean design of this ball knob makes it a versatile option for either a classic or modern décor. These knobs are perfectly suited for a cabinet or drawer, as they are glass, however, they are not recommended for use on heavy drawers without drawer slides. These knobs are mounted with a single center machine screw (included). Please see the “dimensions” tab for full product specifications. Due to the nature of glass, slight variations in color might occur.