[SOCKET ADAPTER] : 1/4 drill socket adapters are premium utility tools that can meet your daily life and use needs. Two colors and appearance are available for your choice [HIGH QUALITY MATERIALS] : Chrome vanadium steel, which ensures the durability, long service life, corrosion resistance and wear resistance of the product. The countersink Length is 6cm [PREMIUM PERFORMANCE] : Magnetic, solid and reliable connection, durable, black knurled portion can improve grip power, better torsion. Exterior: black, with knurled & black, without knurled [WIDE APPLICATION] : Suitable for hammer, impact drill(the tools that connecting style is SDS converts to hex shank). Applicable for those hex shank tools, such as batch heads, chamfers, etc