Experienced users of the bump and rapping techniques report that one's success depends on many factors: The age of a cylinder (and thus the clamping force of the pin springs), the maximum length and differences in the length of the core pins, the type of key profile, differences in the designs of different manufacturers, etc.
It is therefore necessary to control the type of stroke very carefully - short, dry strokes, but also light, springy variations are necessary in order to achieve the right percussion effect with the bump key technique and so be successful.
That is why we have developed a tool that, due to its nature, allows all bump variations. Powerful, light, dry, springy blows of varying intensity can be produced effortlessly
