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HPC AW-38 Auto Wedge Set (set of 2)
It is important to use some kind of wedge when you are trying to insert car opening tools, such as a Slim Jim or a Horizontal Rod Tool. There must be enough space created by this wedge to prevent damage to the vehicle's glass or door sill, or the weather stripping.
HPC's AW-38 is actually a pair of hard plastic wedges for this purpose. It is a low cost solution to the problem and these tools will come in handy in any number of situations besides doing lockouts.
Each wedge has a taper at the tip for easier insertion, and each has an opening at the top through which you can insert a fiberoptic probe or a probe light.
If you have an air wedge (or wedges), you will probably want to use a plastic wedge to get it started into the narrow space between window glass and door frame. The AW-38 wedges are perfect for this as well.