This replacement wrench ring set is made from premium rubber material, which can support lasting use. These o-rings have high durability, not easy to deform or break. This replacement wrench ring set will allow your wrench to work smoother and have better using performance. Features -Color: As shown-Material:Iron, rubber-Size:1.34X1.34X0.20cm,1.10X1.10X0.20cm/0.53X0.53X0.08in,0.43X0.43X0.08in- Rubber ring is used for supporting the retaining ring, rubber ring and retainer ring will worn over usages.- Easy to use, install the O-ring first, then install the impact wrench sleeve retaining ring, and clamp it to the appropriate size with pliers.- This wrench ring kit fits for most electric and air wrenches with 12.5mm square drive, better satisfy your demands.- Scientific design, high strength, high hardness, and excellent durability, the wrench rubber rings will easily meet your needs.- Exquisite workmanship, reasonable structure, professional and practical, impact friction rings can bring you convenience.Packing list: 12 x retaining rings12 x rubber rings