How air-wedge and long-reach lockout tooling works
An air wedge is a thin inflatable bladder inserted in the top corner of a door frame. When inflated with a hand pump, it creates a gap of 25 to 40 mm between the door and the pillar. A long-reach tool (a rigid or flexible rod, 700 to 1,200 mm long) is passed through the gap to actuate the interior door handle, depress the unlock button on the central locking module, or turn a manual lock plunger.
Modern vehicles have door seals tight enough that the air wedge creates only a small gap, sufficient for a thin reach tool but not for a locksmith's traditional long-reach arm. Operators carry multiple reach tool profiles to suit different door geometries.
The air wedge and reach tool method is non-destructive: it leaves no marks on the door frame if performed correctly. Incorrect technique, over-inflating the bladder, can bend the door frame and create a gap that is no longer weathertight. A competent operator applies the minimum inflation needed to pass the tool and no more.
