Description: Isolation Fucntion: Battery isolation switch helps you isolate and secure the electrical system, eliminate any power draw 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.