Feature:1. How It Works: Checking auto lock loop, if the light is on, it means the lock has no problem. If there is no light on, it means there is a problem with the lock hoop.2. Applicable People: Auto key lock inspection loop is an essential tool for locksmith or key programmer, dependable to use.3. Premium Material: Car lock checker is made of premium ABS material, wearproof, sturdy and durable, long service life.4. Installation Place: The installation is simple, just place the auto key lock inspection loop over the ignition switch.5. Application: Universal type, car lock check tool can be widely used in cars, high performance, strong reliability, making sure safety use.Specification:Item Type: Auto Lock Inspection LoopMaterial: ABSFitment: UniversalInstructions:Place the Loop over the ignition switch.Introduce the ignition key through the hole and into the switchIn most applications when the key is turned to the ignition on position, the Loop Led will flash once to signal that communication between the key and transponder antenna is correct.On some vehicles, when the key is in close proximity to the ignition switch, the LED may flash before the key is even turned. This is also an indication of good communication..Package List:1 xAuto Lock Inspection Loop