1Effective Protection: Push the button in the cover, resuce wearing and tearing, make the switch longer life. 2Easily Install: Just install the base on the bottom of the emergency stop switch and it can be locked and removed at will. 3Easily Use: When you don't need to lock it, you can keep the base on site without affecting the operation at all. 4PC Material : Plastic construction switch protector guard is special design for push button switch. 5Applicable Scenarios: Suitable for industrial, chemical, electric power, petroleum, coal, flammable and explosive places. Item Type:EmergencyButtonSwitchCover Material: PC Model: BS-03 Applicable Scenarios: Suitable for Industrial, Chemical, Electric Power, Petroleum, Coal, Flammable and Explosive Places Mounting Hole Specifications: Bottom Hole Diameter of the Protective Cover: Approx. 46mm / 1.8in Diameter of the Bottom Hole of the Semi Circular Fitting: Approx. 30.5mm / 1.2in Diameter of the Bottom Hole of the Circular Fitting: Approx. 22mm / 0.9in 10 x EmergencyButtonSwitchCover 10 x Round Accessories 10 x Semicircular Accessories 10 x Double Sided Stickers