Let's take a closer look at this type of instrument and the values indicated on it. Abbreviation ign/dr/bt refers to "ignition," "door," and "button", a common abbreviation used to describe a type of 2-in-1 locksmith tool that can pick and decode both car ignition locks and door locks. Such tools have been created to be used by locksmith proffesionals to quickly open or decode automobile locks
Abbreviations:
IGN (Ignition): The tool can be used on the vehicle's ignition lock.
DR (Door): The tool can be used on the vehicle's door lock.
BT (Button): This likely refers to a "button" or a specific type of lock, possibly indicating it can be used on locks that are operated by a button or handle.
2-in-1: The tool combines two functions into a single locksmith device to make it easier and speed up the locksmithing procedure.
Common use: These are specialized tools for professional locksmiths to cope with multiple emergency situations with vehicles on the road.