Hairlocs - This system utilizes small metal tubes that has been pre-tipped with an adhesive. It is very similar if not almost curly hair extensions to Eurolocs. Once the metal tube is threaded onto your own best hair extensions, a lock of pre-tipped cheap clip in hair extensions is inserted into the tube and then it was clamped, so to speak, thereby adhering the purple feather hair extensions to your own without the use of hot or cold adhesive.