This replacement wrench ring set is made of selected material, which can withstand use. Features the iron and rubber material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. This replacement wrench ring set will allow your wrench to work smoother. Features -Color:Black -Material:Iron, rubber -Size:1.34X1.34X0.20cm/0.53X0.53X0.08in -Size:1.10X1.10X0.20cm/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 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. - workmanship, reasonable structure, professional and practical, impact friction rings can bring you convenience. Package list: 8 x retaining rings 8 x rubber rings