Technologies Aluminum Construction Aluminum is a robust and lightweight material. Therefore, Lezyne uses it to manufacture various precision pump components. Composite Matrix Composite Matrix is a very stable, fiber-reinforced material that Lezyne uses to create durable components. CNC Machined CNC-machined aluminum parts for precise and long-lasting components. Air Bleed System (ABS) By pressing the ABS button, air pressure can be released from the pump hose, making it easier to remove the Flip-Thread Chuck from the valve. When using auto valves, tire pressure can be adjusted by pressing the ABS button. Threaded Connection Lezyne's ABS Flip Thread Chuck screws directly onto the valve, providing a secure, airtight connection. Compatible with Presta and Schrader valves. Weight: 92 g.