Features Easy Installation Made Simple: Quickly install the base on your emergency stop switch without disassembly, ensuring hassle-free setup for immediate use Versatile Usage Options: Keep the base installed without locking for regular use, or easily secure it when needed, providing flexibility for different operational needs Compatible with Standard Sizes: Designed to fit all standard knob switches with a compatible bottom mounting hole diameter, ensuring broad usability across various applications Durable PC Material Construction: Crafted from high-quality PC material, this protector is wear-resistant and dustproof, enhancing longevity and reliability in tough environments Ideal for Various Industries: Perfectly suited for industrial, chemical, electric power, petroleum, and other hazardous locations, ensuring safety in flammable and explosive settings Features: 1、[EASY INSTALLATION] Just install the base on the bottom of the emergency stop switch to install, no need to disassemble. 2、[MULTIPLE USAGES] When you do not need to lock it, you can only keep the base without affecting the use, or you can lock the base. 3、[STANDARD SIZES] With standard bottom mounting hole diameter, suitable for all kinds of standard knob switches. 4、[PC MATERIAL] Made of excellent PC material, wear and resistance, with dustproof effect. 5、[WIDE APPLICATIONS] Suitable for industrial, chemical, electric power, petroleum, coal, flammable and explosive places. Specification: Item Type: Round Switch Guard Cover Model: BS-03 Material: PC Uses: Applicable scenarios, suitable for industrial, chemical, electric power, petroleum, coal, flammable and explosive places Bottom Hole Diameter of the Protective Cover: Approx. 46mm / 1.8in Bottom Hole Diameter of the Semicircle Fitting: Approx. 30.5mm / 1.2in Bottom Hole Diameter of the Circular Fitting: Approx. 22mm / 0.9in Package List: 1 x Protective Cover 1 x Circular Fitting 1 x Semicircle Fitting 1 x Double Side Sticker Package List 1 x Protective Cover 1 x Circular Fitting 1 x Semicircle Fitting 1 x Double Side Sticker