This 15-piece jiggler key set is computer engineered. It was developed based on the technical data of dozens of lock types, with the elimination of impossible locking codes, and the mathematical optimization of the diversity of individual jiggler keys. The jiggler keys are stam-ped out of 0.8mm flat spring steel of the quality CK101, then deburred and nickel-plated. They enable a high success rate even without lengthy practice. The car tension tool is a useful addition.