Makes reliable thread repairs without drills, taps, tools or inserts. Restores worn, stripped or damaged threads and eliminates future corrosion, galling, seizing and rust. Effective up to 128 ft. lbs. of torque and between -65°F to 300°F (-54°C to 149°C). Repairs most metal-to-metal fasteners up to SAE grade 5 English and 8.8 metric (coarse and fine).