These retaining rings are crafted to fit seamlessly with pneumatic and electric impact wrenches, a reliable way for maintaining socket stability. Their easy-to-install design allows users to quickly replace worn-out parts, ensuring uninterrupted performance in automotive repairs, construction projects, and heavy-duty applications. Features -Color:Black -Material:Iron, rubber -Size:1.34X1.34X0.20cm/0.53X0.53X0.08in(inner diameter: 11.3mm) -Size:1.10X1.10X0.20cm/0.43X0.43X0.08in(inner diameter:7mm) - rubber material: the o ring are crafted from stable rubber, reliability and resistance to breakage for consistent performance -Sturdy iron construction: the retaining rings are made from iron, ensuring they are strong, stable, and resistant to wear and tear -Sufficient supply: with a generous quantity of rings included, you can easily replace worn out rings as needed, ensuring you always have spares on hand -Simple installation process: install the rubber o ring first, followed by the impact wrench socket retaining ring, and use pliers to secure it to the correct size -Fit: designed to fit most electric and pneumatic wrenches with 1/2" square drive, this kit offers broad compatibility Package list: 9 x Rubber o x Impact Wrench Socket Retainer Ring