Sonata 11/16 Inch Diameter Polished Nickel Cabinet Knob 11/16 in. (17mm) Diameter 1-15/16 in. (49mm) Backplate Diameter 1 in. (25mm) Projection Backplate has pre-drilled hole for nail to stop rotation to not mar cabinet/drawer face. Nail included. Finish: Polished Nickel