The locking wire inserts employ spring coil design with deeply threads to loosening under vibrations, outperforming standard fasteners while remaining for repeated thread repair applications Perfect for restoring threads in engine blocks, industrial equipment, or household appliances where vibrations resistant fastening and repeated screw adjustments are required Premium 60Piece Threaded Inserts set with 7Sizes ( 3mm-12mm) features stainless steel construction for enhanced wear resistance, vibrations absorption, and uniform load distribution in low strength materials Each set includes 60pcs resistant stainless steel inserts with standardized dimensions, offering complete thread repair coverage from small electronics to heavy duty applications Ideal for mechanics, enthusiasts, and maintenance professional needing reliability thread reinforcement in automotive, machinery, or electronic equipment repairs, Manufacturer: YIGZYCN