Horology, the science of measuring time and often referred to as the science of clock making, uses dedicated and precise tools and measurements when constructing the components of a clock. If a horologist were to only marginally err, even as much as being off a fraction of a centimeter, the entire timepiece would not function properly. Because of this incredible learning curve in custom geared clocks, we're going to use a pre-constructed gear box, and incorporate it into a unique clock of your own design. Prefabricated gearboxes and hands can typically be found at any crafts store.