With the Lezyne Slip Fit Chuck elbow you can replace the double adapter of Lezyne floor pumps. The one-sided elbow allows you to reach valves even in tight spaces. However, the Lezyne Slip Fit Chuck aluminum piece only fits on Presta valves. With the Lezyne Pressure Drive S and Lezyne Alloy Drive M hand pumps, you screw the Slip Fit Chuck onto the pump instead of the hose.