Powerbuilt 643506 3/4-Inch by 1/2-Inch Adapter for 3/4-Inch Drive Made to be the most reliable tools in the market today Tool solutions for most all situations Built to exceed tool standards Mates 3/4-Inch drive tools with 1/2-Inch drive sockets and accessories Mirror-polished chrome vanadium steel Meets or exceeds ANSI standards Lifetime warranty