Wheel and leg cup swivels independently of each other. Round cup caster creates eye-catching appeal wherever used. When installing leg must fit snugly inside cup for a proper fit. Fit for wooden furniture legs to create unique chairs, sofas and tables. This castor has a round cup into which a wooden leg is secured with three screws for the sides of the cup. Mounting screws are not included here. Inner Cup Diameter-1.2 inch, Inner Cup Depth-1.1 inch, Mount Hole Diameter-0.16 inch, Wheel Diameter-1 inch, Overall Size-1.5 x 2.56 inch