Lezyne Floor Pump HP (Road) ABS Flip ChuckThe Lezyne Floor Pump HP (Road) ABS Flip Chuck is used Air Bleed System (ABS) is an in-line air pressure release valve that is built into Lezyne Flip-Thread Chucks and Flex Hoses. When using an ABS equipped Lezyne floor pump to inflate a Presta valve tube, pressing the ABS button releases the air back pressure, which allows  the easy removal of the Flip-Thread Chuck without the risk of unscrewing removable Presta valve cores. When inflating Schrader valve tubes, pressing the ABS button releases air from the tube to adjust tyre pressure.Features:In-line air pressure release valeGenuine replacementEasy to fit and removeABS is patent pending worldwideBuy Lezyne Accessories from Chain Reaction Cycles, the World's Largest Online Bike Store.