1Control to make the front and rear brakes synchronized. 2Hold the brake pressure to the front or rear brakes to hold the vehicle on a hill or the starting line at the drags. 3This high quality solenoid can be used on either the front or rear brakes of your vehicle. 4It can handle pressure spikes up to 1000 psi. 5Works with 1214 volt electric systems.Features: Control to make the front and rear brakes synchronized. Hold the brake pressure to the front or rear brakes to hold the vehicle on a hill or the starting line at the drags. This high quality solenoid can be used on either the front or rear brakes of your vehicle. It can handle pressure spikes up to 1000 psi. Works with 12-14 volt electric systems.Specification: Condition: 100% Brand New Material: Stainless SteelColor: Black Fitment: Works with 12-14 volt electric systems Package list: 1 x Brake Lock 1 x Swtich Accessory1 x Light Accessory3 x Screws 1 x User Manual