The Edelbrock/Russell Speed Bleeder replaces the original bleeder valve in the caliper/wheel cylinder with a spring-loaded one-way ball and check valve design. This unique design opens to allow the old fluid and air out, and then closes automatically between pumps to prevent the old fluid and air from re-entering the line. The check ball is centerless ground 410 stainless steel that resists corrosion and galling. The patented thread sealing system displaces air and moisture during thread engagement as well as eliminates air from being pulled back into the system during bleeding.