Description: Isolation Fucntion: Battery isolation switch helps you isolate and secure the electrical system, eliminate any from the battery when vehicle or boat is not in use, disconnects the battery. Package include: 1Pcs Battery Disconnect Switch 2Pcs Removable Keys 1Pcs Waterproof Cover 4Pcs Copper Terminals 4Pcs Heat Shrink Tubes. Waterproof Cover and Keys: It provides a waterproof cover to protect the keyhole against the dust and water, equipped with 2 keys Easy to install. Wide Application: The battery switch is widely used for car, marine, boat, RV, camper, travel trailer, truck etc. Premium Material: Battery disconnect switch is made of premium metal PP material, wear resistant, durable and reliable to use. Specification: Material: Metal and PP Size: 5.8cmx10.6cm/2.28inchx4.17inch Copper Terminals: 0.64 cm/0.25inch Mounting Holes: 0.96 cm/0.38inch Base Diameter: 2.35 inch Key Posts To Base Height: 3.2cm/1.26inch Diameter: 2.2cm/0.87inch Package Includes: 1Pcs Battery Disconnect Switch 2Pcs Removable Keys 1Pcs Waterproof Cover 4Pcs Copper Terminals 4Pcs Heat Shrink Tubes Note: Please allow slightly errors due to manual measurement and different monitors.