Auto Jigglers aka "Tryout Keys" & automotive jiggler keys come in many different varieties and though they are not exact matches or master keys the cuts on jigglers resemble the cuts on actual manufacturers auto keys. These generic try-out keys will open automotive door locks on many foreign and domestic autos quickly and easily. Auto jigglers are not guaranteed to open specific vehicles as they are NOT master keys. The keys are "tried out", "jiggled" in the lock to see if they will work. Jigglers work on many cars but there are no guarantees. Once purchased they cannot be returned.