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The QR-508 Square-Drive to Hex Bit Socket Adapter from Apex is a versatile tool that offers quick and easy conversion between two common fastener types, square drive and hex bit. Perfect for mechanics, technicians, or anyone working on projects requiring multiple size or style fasteners, this compact adapter boasts a length of 2-1/8 inches for easy use in tight spaces. The high-quality construction ensures durability and long-lasting performance, while its lightweight design makes it easy to transport and use on the go. With a maximum socket drive size of 1/4 inches and hex bit size of 1/2 inches, this adapter delivers reliable conversion for various applications in automotive, industrial, or home settings.