1、Function: Control to synchronize the front and rear brakes. Hold the brake pressure of the front or the rear brake to keep the vehicle on a hill or on the starting line of resistance. Easy to do a burn out by locking the front tires and releasing the back brakes with this system. Suitable for 12‑24VDC power system. 2、Used for Drag Racing: Lock the front tires of your car, reducing the chance of your car rolling over the lights before it's time. Also locking the front wheels produces a more efficient burn‑out to heat up your tires. The release time is 10 milliseconds, the vibration resistance is as high as 30‑G, and there is no mechanical failure. On the street or off‑road, when the clutch and brake are required at the same time, the wire lock can also be used as a temporary electronic parking brake. The kit allows you to lock the front brake or the rear brake at will. 3、Practical to Use: This launch control is a complex device that can be installed in your existing braking system. The easy‑to‑install solenoid valve provides the brake holding capability you need. If you need a mountain stand when going uphill, it can be used for racing or street applications. This high quality solenoid can be used for the front brake of your vehicle. It can handle pressure peaks up to 3000PSI line pressure. Including lights and switches. 4、High Quality: Stainless steel valve assembly for ultimate corrosion control. The electric coil is completely enclosed in epoxy resin to ensure reliability. The finned housing not only looks good, but also helps to dissipate heat. 5、Easy to Install: The wide and lightweight base provides better installation stability. Easily serviced in the field, including additional threaded ports for brake line pressure gauges. Item Type: Front Brake Line Lock Material: Stainless Steel + Aluminum Model: Roll Control Hill Holder Kit Voltage: 12-24VDC Pad Material: Stainless Steel & Aluminum Line Lock Finish: Silver Anodized Line Lock Material: 6063 Aluminum, Stainless Steel Line Lock Type: Electric Inlet Attachment: Female Threads Outlet Attachment: Female Threads Inlet Thread Size: 1/8-27 NPT Outlet Thread Size:1/8-27 NPT Line Lock Inlet Quantity: Only One Mounting Style: Bolt-On Solid or Vented Rotor: Solid Rotor Style: Dimpled+Drilled+Slotted Suitable for: Disc+Drum Placement on Vehicle: Front Caliper Finish: AnodizedApplication:  Used in Drag racing to positively lock the front wheels, producing a more effective burnout. 1 x Front Brake Line Lock 1 x Fuse 1 x Controller 1 x Indicator Light 3 x Fixing Screws 1 x Manual