Features: Compatible for type 3/8inch impact wrench, ensuring a perfectly fit and improving tool performances. The size of the O-rings is 0.32x0.05inches, the size of the split clamps is 0.4x0.08inches, and the size of the tool is 1.37x0.4inches. Please check the size carefully. The O-rings provide good sealing performances, effectively preventing air leakage and leakage, ensuring work safety. The rings is craft from rubber materials to ensure long-terms reliability and durability. Contains 1 tool, 3O-rings and 3ring clamps, enough for daily replacement. Specifications: Component:Rubber O-rings size:0.32x0.05inches Opening clamps size:0.4x0.08inches Tool size:1.37x0.4inches Color:Black Package Includes: 3pcs Retainer Rings 3pcs O-rings 1pc Tool note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.