The HELI-COIL Threaded Mandrel is a great addition to your tool box. It will help you thread internal threads in 8-32 fasteners, without damaging the fastener or the material. This threaded mandrel has an UNC thread type and can be used with an internal thread size of 8-32. The steel construction of this tool ensures that it will last through years of use. When you need to add threads to an existing hole, the HELI-COIL Threaded Mandrel Tool is what you should reach for.. This item has been restricted from sale in the following state (s): []