Fangrui Product Details Our 3/8 impact adapter efficiently converts your hexagonal polygon size into square head size, enabling easy socket installation. Its the perfect conversion accessory that enhances your work efficiency, making your projects more convenient and quick. Crafted from heat-treated Chrome-Vanadium Steel (-V), our 3/8 socket adapters exhibit superior performance compared to your average high-speed steel tools. They offer impressive wear resistance and toughness, complimented by a blackened which not only adds an aesthetic elements but also enhances rust resistance and extends the Adapter Sets . With a square head size of around 10mm/3/8 inch and a hexagonal handle size of about 6.3mm/1/4 inch, these 3/8 socket adapters are designed for durability and precision. Each adapter comes with a spring ball-bearing part on the square head that ensures your socket stays firmly in place and avoids sliding during work. These socket adapters are designed for manual-driven applications or can be used with power tools alongsi