The lezyne road drive is not only easy to look at it39s easy to use as well the extension hose hides in the piston when not in use and nearly doubles the length of the bike pump when attached to your presta valve simply unscrew the top of the hose from one end reverse it and screw it back into the business end of the pump the flexible hose and threaded valve interface makes tweaked presta valves a thing of the past eliminating the need to carefully push on and pull off the pump head