Durable thread restoration: Made from 304 stainless steel, these wire screw sleeves provide a permanent for stripped or damaged threads. The hardness of the material minimizes wear from repeated use, extending the life of repaired connections for both DIY users and professional mechanics. Stronger threaded connections: The wireinsert design spreads load evenly across the threads, corrects pitch deviations, and absorbs vibration. This design can increase connection strength by up to 300% compared to standard threads, reducing the risk of stripping or crossthreading in softer materials like aluminum, plastic, and wood while keeping fastener alignment precise. Vibrationresistant locking: A specialized locking mechanism in each sleeve maintains constant tension and resists loosening under shock and vibration. Unlike ordinary locking washers, these wire inserts hold fasteners securely in demanding environments such as engines and industrial equipment. Broad compatibility and convenient kit: This 60piece assortment includes 10 thread sizes from 256 to 3/816, with six inserts per size. The variety and quantity make the set suitable for multiple repairs and organized storage in a workshop. Key attributes at a glance: Material: 304 stainless steel Function: permanent thread and reinforcement Performance: up to 300% stronger connections (vs. standard threads) Vibration resistance: locking mechanism keeps tension under shock/vibration Compatibility: works in aluminum, plastic, wood, and other common materials Kit: 60 pieces, 10 sizes (6 pieces of each size), covers 256 through 3/816 Practical use scenarios: Automotive : Restore stripped spark plug or enginethread holes so spark plugs, sensors, and bolts hold securely and resist vibration in the engine bay. Machinery maintenance: Reinforce threads in industrial equipment where repeated assembly and vibration can loosen fasteners, preventing downtime from loose or failed connections. Electronics and hobby projects: small threaded holes in chassis or housings made of aluminum or plastic to restore reliable fastening for panels, brackets, and assemblies. What you get: a durable, vibrationresistant set of 60 304 stainless steel wire screw sleeves that restore and strengthen threads across a range of common sizes, suitable for home, workshop, and professional use.