GM - Door Locks (spaces 4-10) - TO-91 (B86) 128pc. Try-Out Key Set

This tryout set is grouped into 4 boxes of 32 keys each. These groups are arranged according to the first 2 cuts in the door. By reading the 1st 2 cuts in the door it will allow you to only try 32-64 keys. These keys are cut the same on both sides so try 1 key if it does not work go to the next! After you find a key that works the door lock you are missing cuts 1-3 to get a complete key.