Getting locked out of your car is never fun. This Tool Will Open A Locked Car Door When The Driver Leaves The Keys Inside. This Lockout Tool Is To Be Used By Professionals In Either The Locksmith Or Towing Business. This lockout tool measures 22 X 1-1/4 inch and 0.7 mm-thin enough to slide down inside.It is possible to use a slim jim -- if the car does not have a shielded lock rod.