There are different types of badges which are carried by individual and official just like Metal badges, Brass badges, Megnatic badges and Aluminium badges etc. Badges finds its use in a diversified area where there is a need to different among people to each other.
Metal badges generally is used only Securities, Police and law enforcement officers of all levels. If you want to know more please visit:-http://www.badgesplus.co.uk/product-details.php?parentId=3&catid=13&prodId=68