Wear Resistant: Made from alloy steel with black oxides finish, these thread adapters excellent wear resistance and durability for good . Size Conversion: Easily converts threads from 1/2x28 to 5/8x24, providing versatile compatibility with different systems. Complete set: Includes 2 threaded adapters and 2 washers for quick and convenient installation in your vehicle's oil systems. Application: Designed specifically for automotive use, ensuring good in without crosses threading risks. Notice: Intended for vehicle applications only; improper use may affect functionality. Follow manufacturer guidelines for optimal results.