Keyseater
A keyseater is a machine used to make the keyway hold inside a locking mechanism. Keyseaters are a type of broaching machine, which is a tool with a row of sequentially larger teeth used to cut holes and to make grooves in a material's surface. More specifically, keyseaters are internal broaches, meaning they are specialized designed to cut holes in interior areas.
A keyseater, like all broaches, is a hydraulic cutting tool that can be used on various materials, including metal, wood, and plastic. A keyseater's teeth are available in many different sizes and spacing configurations, depending on the part that is being broached and the desired depth of the keyhole. Unlike vertical broachers, keyseaters are guided, resulting in a higher level of accuracy.