All of the parts have been designed to be very much in the spirit of the original watch band. The Design is not identical but it has been designed such that parts are fully interchangeable between the 3D printable models and the real watch band so you only have to print the parts you want. When using the 3D printed clasp a piece of 1.75mm filament is used as the pivot rod. Simply slide it in and then melt the ends to the clasp with your hot end nozzle.