These Super Slidex(TM) ultra-sliding guides help you move furniture as easily as if it had wheels. The Teflon base slides smoothly in any direction over a wide range of flooring, including carpet, tile, linoleum, ceramic and slightly uneven surfaces. The nail-on design and included drill bit make it easy to install and secure these glides to the bottom of furniture and furniture legs. The round shape and grey colour complement the style and design of your furniture legs. They are 7/8" (22 mm) in diameter and the package contains 4 furniture glides and a drill bit.