Loc extensions are like regular extension. The purpose is to make the hair look longer of more full. The different types of extensions are Faux locs, Wrapped extensions, and pre-made extensions. This video shows the Pre-made method.
For this method the client can buy premade human hair locs online with any specifications: color, length, girth, etc. My client had locs before, and when he cut them off he saved them. Once he was ready to rejoin the Loc-Nation, we reattached them!