Brake blleding has always been an inconvenient and messy job. Commercial shops typically use an expensive pressure bleeder - which, unless used properly, can introduce air bubbles into the system through cavitation. Vacuum bleeders are less expensive but can also introduce air into the system. The time honored manual method (still universally used in racing) requires two people: one to pump the pedal, and another to open and close each bleed screw in sequence. Again, proper procedure and coordination are required to prevent air inclusion. Earl's Solo-Bleed bleeder screws solve both problems. a direct replacement for the original equipment bleeders, Solo-Bleed allows one person to safely bleed brakes without a mess and with no chance of air inclusion.Pit Stop USA offers Earl's Solo Bleeds - 3/8"-24 x 1-11/64" Thread - (2 Pack) 280021 at low everyday prices. Be sure to check out all of our products from Earl's Performance Products including Earl's Performance Products Bleeder Screws.