HEX BIT SOCKET: This is a 5 mm hex socket with a red anti-corrosion coating to increase its service life and make it easier to see in darker and narrow areas and work more visibleS2 & CR-V STEEL:Drop forged heat treated S2 alloy steel drill bits are directly pressed into the cr-v socket, which has high hardness and forms a permanent connection to reduce wear and ensure maximum durabilityALLEN KEY SOCKET: Large, clear die-stamped size marking is easy to read and can’t wear off.Polished, chrome-plated finish easily wipes clean and is highly resistant to corrosionPRECISION BITS: The hex bit feature beveled end faces for precise insertion, protecting both the bit and fastener from edge damage and stripping for a perfect fit with the fastenerWIDE APPLICATION: The 5 mm hex socket itself is designed to be short, so it can be easily removed and installed on motorcycles, off-road vehicles, and car allen head screws. If you encounter any issues while using this bit socket , please feel free to contact us