A cable retention mechanism locks an external connector with an inputoutput connector of an electronic device. The diamond-like carbon material of the present invention is highly tetrahedral, that is, it features a large number of the sp3 carbon-carbon bonds which are found within a diamond crystal lattice. A computerized system may be employed to perform the above method and the system may include a computer readable medium for executing the method. According to an embodiment, an outer gear ring is arranged so as to interact with the at least one planet wheel, which outer gear ring is connected to the static housing by a second splined connection.