Props are usually made in several versions, with different intended uses. For collectors and enthusiasts, the most sought after version is the HERO prop, which is used by the lead star. The hero prop is the most detailed version, being used for close-up shots.

There are background props, typically used by second role actors and extras. Background props are not as detailed as the hero prop.

There are also stunt props, which can be a rubber version of a hard prop for the safety of actors. Stunt props can also be a much less detailed version of the hero prop which will be set on fire, blown up, or literally, as in the case of K.I.T.T., the Knight Rider car, used for stunts.

Hero props are the best references for study when considering building a replica of your favorite prop.

For the most popular movies and TV shows, studios put on display the props in promotional tours and at various locations, such as theme parks and museums. They can also be seen in backlot tours. Although sometimes introduced as being hero props, they are not all actual “heroes”. For having been mandated by movie studios to build replicas of some props, I can tell. Keep this in mind when looking for reference material about a specific prop.