This battery isolator switch prevents the battery from draining while your vehicle is stored with this heavy-duty battery cutoff switch. It cuts power to race cars and prevents fires. Extends the life of your vehicle's battery. This durable cutoff switch has a removable key lock to disconnect power and prevent theft. The waterproof cover can better protect the keyhole. Rust and corrosion resistant, solid stainless steel nuts and washers. Easy to install and simple to use. Package includes: 1 x 12v battery isolator switch, 2 x keys. Measurements: Width: 8 cm, Height: 14 cm, Length: 17 cm.