Lezyne abs 1 pro hp chuck an easy to attach and remove replacement part for lezyne's high pressure floor drive pumps and micro floor drive pumps, the lezyne abs 1 pro hp chuck ensures efficient and precise engagement with your valves for optimal and economic inflation. Easy to control pressure release systemideal for use with presta and schrader valves, the abs 1 pro hp chuck has a great holding screw on design, making sure that it stays fixed and steady as you get your tyre back up to your favoured pressure. Equipped with an air bleed system to accommodate and rectify any accidental over inflation this great chuck will disengage from the valve safely to prevent damage and detachment of removable valve cores.     features  compatibility all lezyne high pressure floor drive and micro floor drive pumps  pressure control abs air bleed system  heads presta and schrader buy lezyne accessories from chain reaction cycles, the world's largest online bike store.