The basic idea of a floor pump is pretty straightforward: a cylinder and a piston. Many manufacturers get this right, but few can match the reliability and innovation of Lezyne when it comes to hoses. If your hose or valve has failed or if you want to preempt that inevitable, ride cancelling catastrophe then the ABS Floor Pump Hose may be your only hope. The hose terminates with Lezyne's ABS Flip Thread Chuck, which screws into the hose and accommodates both Presta and Schrader valves. The Flip Thread Chuck's ABS is a wee button on the unit's side that either releases hose pressure so you can gracefully remove it from the tube's valve Presta or bleeds pressure from the tube for exact PSI control Schrader.