This thread repair set can be placed in the screw hole of the workpiece such as aluminum alloy to form a standard internal thread with high strength, wear resistance and high precision. Thread inserts are made of high-strength diamond-shaped steel wire with high strength and wear resistance. This thread insert set contains 60pcs inserts from M3 to M12 which can meet your different needs. This thread repair set can be widely used for high voltage switch gear, microwave communication, automotive parts, aerospace precision parts, electronic products, air equipment, radiators, etc.