The retaining ring fits onto drive of the impact wrench anvil and holds the securely in place. This allows you to quickly and easily change out sockets or other attachments as needed, without having to worry about them coming loose during use. The use of sturdy iron and rubber materials ensures their longevity. Features -Color:Black -Material:Iron, rubber -Size:1.34X1.34X0.20cm/0.53X0.53X0.08in -Size:1.10X1.10X0.20cm/0.43X0.43X0.08in - Secure hold: These retaining rings provide a secure hold for sockets or other attachments, ensuring that your work runs smoothly and efficiently. - Easy to install: Firstly slip rubber rings onto the square drive and fix iron rings next. This makes it easy to change out sockets or other attachments as needed. - Sturdy materials: Using premium iron and rubber materials, these retainer rings are built to withstand heavy use during an extended period. - Enough replacement: This package comes with a large quantity of rings that offer sufficient replacements for your different tasks. - fit: Precisely made with fine workmanship, these wrench rings can be used with a wide range of impact wrenches and sockets with standard sizes. Package list: 12 x iron rings 12 x rubber rings