Brake Bleeder Wrench Tool, 8mm 6point socket brake fluid clutch bleeder with builtin wrench. For universal brake nipples. Widely used on cars, light trucks, or motorcycles brake calipers or wheel cylinders. Wrench Seal for Bleeder Valve. Easy to loosen and tighten with builtin wrench and socket without breaking the seal. BuiltIn OneWay Check Valve. Designed with a check valve inside the socket to prevent backflow of dirty brake fluid. For Bleeding Brake and Hydraulic Clutch System. Ideal for bleeding brake and hydraulic clutch systems without removing the wheels. Builtin wrench and socket directly fit to the brake bleeder screw for easy loosening and tightening. Common use scenarios Bleeding brakes on a car, light truck, or motorcycle without removing the wheels. Bleeding hydraulic clutch systems in compatible vehicles. Working with universal brake nipples across different makes and models.