The Master Lock No. S2153 Installed Push Button and Rotary Switch Cover prohibits access to a switch or control. The cover fits both 30.5mm and 22.5mm diameter switches and accommodates buttons up to 1-9/16in (40mm) diameter and 1-3/4in (44mm) tall. Device is captured by the rotary or pushbutton switch bezel and features a clear base and cover to allow visibility of nameplates and labels.