1Suitable for engine and mechanical maintenance, for recovery of damaged threads 2High strength, high accuracy, it is wear resistant, environmentally friendly and non-toxic 3It can prevent loose bolts and is especially suitable for products requiring high insurance factor 4Easy to maintain, insert the thread into the damaged screw hole, then the screw hole can be used normally 5Specially designed to restore damaged threads, strip female threads and form a strong female thread in soft metalItem Type: Thread Repair KitMaterial: Steel + Stainless steelThread Size: 1/2in-13border: .5pt solid000;};border: 1px solid000important;}1 X Twisted Drill1 X Handle Tool1 X Installation Special Tools1 X Thread Tap1 X Removal Tool4 X 1/2in x 1D Threaded Insert4 X 1/2in x 1.5D Threaded Insert4 X 1/2in x 2D Threaded Insert