Review on Origin8 Presta Valve Core Remover by Patrick Pearson

Very simple overview. If you have bike tubes with replaceable Presta valves (Schwalbe tubes seem to have them, other brands may or may not have them) you will need a tool to remove or tighten them. Tighten them if you have a threaded pump head, and also occasionally remove inserts like the otherwise great Lezyne pump heads, or remove them if you have a snap-on pump head (especially the Zefal HPX) that finishes ham hands. deforms the valve. It's small and easily lost, so good luck keeping it for a long time. I wish there was a loop on one end for attaching to a cable or something. These are minor quirks that do not affect the tool's function. Please note that a 4mm spanner will fit on Presta valves in a pinch.