Peep holes for door are a common safety feature that allows people to see who is outside their door before opening it. They are usually installed at eye level and come in different sizes and materials such as glass, plastic, or metal. Peep holes can provide a sense of security and peace of mind, especially for those living alone or in areas with high crime rates. It's important to ensure that the peep hole is installed correctly and regularly maintained to ensure its effectiveness.In addition to the traditional peep holes, there are now digital peep holes that use cameras and screens to display a live feed of the outside. These can be particularly useful for those with limited mobility, as they can see who is at the door without having to physically approach it. However, it's important to consider the potential privacy concerns that come with such technology. Regardless of the type of peep hole, it's always a good idea to exercise caution when opening the door to strangers and to never feel obligated to do so if you feel uncomfortable or unsafe.