Usage Tips:Comprehensive Kit Includes: 3/8inch impact wrench retainer rings and O-rings, along with a specialized anvil installation tool, ensuring you have everything needed for setup and maintenance of your tool. Universal Compatibility: Designed to fit any standard 3/8inch Milwaukee type impact wrench,providing a reliable and secure fit for both electric and pneumatic models. Optimal Material and Design: Crafted from rubber components, our retainer rings and O-rings are built to withstand rigorous use in any professional or home environment, ensuring longevity and performance. Easy Installation Process: The kit includes an anvil installation tool which simplifies the process. Simply place the retaining ring into the tool's recess, insert the anvil at a 45 angle, and then straighten to secure the components effectively. Versatile Use: Ideal for both electric and pneumatic 3/8inch square drive wrenches, this kit ensures a perfect fit and function for a wide range of applications, making it a must-have for any mechanical or automotive toolkit. Colour:Black Material:rubber Package Contents: 20 x O-rings and retaining rings 1 x installation tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.