Lezyne Tech Drive HV Hand Pump Reaches tire pressure with 30% fewer strokes compared to conventional pumps Smaller barrel design requires less force to inflate high pressure tires ABS Flex Hose threads securely to Presta and Schrader valves for a super-tight seal and prevents valve damage during inflation ABS Button releases air pressure from the pump hose for easy Flex Hose removal ABS Flex Hose allows the adjustment of tire pressure when using Schrader valves