Sometimes you need the extra strength of an impact-rated tool in hard-to-reach areas. The perfect solution is the Powerbuilt 1/2 Inch Drive 3 Inch Impact Extension Bar. Each socket accessory is made from Chrome Vanadium steel for added durability. Impact Socket accessories feature an industrial-grade Black Phosphate finish that prevents corrosion and extends the tool's life. The impact extension bar also features spring-loaded detent balls to help lock into the sockets for a precision fit to securely hold sockets and eliminate slop. Powerbuilt impact socket accessories provide increased strength and durability over and above the competition. Powerbuilt impact socket and accessories exceed ANSI standards and are strength tested for performance and quality.