Dual-Size Versatility: 10 sets 1/2 inch + 10 sets 3/8 inch impact wrench retainer rings and O-rings, ideal for switching between tool sizes during automotive repairs, machinery maintenance, or DIY projects. Universal Compatibility: Designed for 1/2 inch and 3/8 inch square-drive impact wrenches, compatible with standard tools—ensures proper fit without guesswork. High-Quality Durability: O-rings made of premium rubber provide a tight seal and help prevent air or power leaks in pneumatic and electric tools. Tool-Free Installation: Slide the retaining ring onto the anvil at a 45-degree angle, then push to lock perpendicularly—replace worn parts quickly and resume work with minimal downtime. Cost-Effective 10-Pack: Each kit includes 10 complete sets (retaining ring + O-ring), providing spare components to help reduce interruptions and avoid frequent reordering. Note: Slight color variations may occur due to lighting and display differences. These do not affect functionality. Color: As shown Material: Rubber Package Contents: 10 sets x 1/2 inch impact wrench retainer rings and O-rings 10 sets x 3/8 inch impact wrench retainer rings and O-rings Only the items listed are included; additional products are not part of this package. Note: Lighting effects and monitor settings may cause slight color differences between the image and the actual item. Measurement may vary by +/- 1–3 cm.