Product Details LOTOTO LS2151 Removable 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 2in (51mm) diameter and 1-3/4in (44mm) tall. The horse-shoe shaped retrofit base allows use with raised nameplates and off-center installation to accommodate rotary switch knobs and clear bases and cover allow visibility of nameplates and labels. Product Features * LOTOTO LS2151 Removable Push Button, Rotary Switch Cover and Emergency Stop Lockout * Prohibits access to a switch or control * Fits both 30.5mm and 22.5mm diameter switches * Clear bases and cover allow visibility of nameplates and labels * Horse-shoe shaped retrofit base allows use with raised nameplates and off-center installation to accommodate rotary switch knobs * Accommodates buttons up to 51mm diameter and 44mm tall * Includes one cover, one new install base and one retrofit base with double-faced adhesive tape