Devices that provide biological identification through each person’s natural uniqueness, which includes eyes, hand written signature, finger, face and palm geometry known as biometric devices. Day by day, the requirement of high security necessitates the biometric devices development and usage. As we, all known that from a small particle to huge mass, there would be a loophole present knowingly or unknowingly to obliterate the essence of that particle or the huge mass. To eradicate this state the biometric devices manufacturers are concentrating more on research and development. After the production of biometric devices, it has send for the biometric testing process that helps the biometric devices producers to stay along with the devices to keep it flawless product. The devices are much convenient in process and set it up in any instances. The manufacturers are providing wide range in the size and style of biometric equipments. Nevertheless, it has mostly used only by the banking and information technology sectors to confirm their customers and employees identity. They feel it has provides the cost effectiveness. Developed countries like United States, Germany, Japan, Australia, and United Kingdom are using these biometric devices in all their fields like defense, technology and scientific labs and in more places. This shows how much they have realized the importance of biometric equipments.