Silverline Threaded Rivet Insert ToolSets Threaded Aluminium Rivets Into Thin Materials, Including Sheet Metal, Plastic & FibreglassPermanent & Reliable FasteningIdeal For Hard-To-Reach LocationsSoft-Grip HandlesIncludes: 4, 5, 6 & 8mm (M4, M5, M6, & M8) Threaded Inserts, Mandrel Tool & Handle Clip