Motion Pro has developed a unique brass bodied tool that makes bleeding your brakes a one-person job. The unique check valve allows fluid and air to escape while preventing air to re-enter the system. Once this unit is primed with brake fluid, simply attach the hose to the caliper bleeder screw and place the other end into a bottle. Follow the included directions. Once all the air is bled from the brake line, close the bleeder screw on the caliper and remove hose. Fits all models with hydraulic brakes.