Manufactured from a special alloy steel and heat treated for optimum strength and durability, the two-piece Impact Rated Hex Drivers from Snap-on (Kenosha, WI) are engineered with precise fit and tight tolerances to prevent slippage and disengagement. The Impact Rated Hex Drivers are designed for use with pneumatic or cordless impact guns. The two-piece design surpasses one-piece models, making replacement economical and convenient. Additionally, the bits can be easily replaced by hand; no need to put them in a vice and punch them out with a hammer. The Impact Rated Hex Drivers include optional retaining rings for added protection, ensuring positive attachment to the anvil.