One of the things I have dreaded for some time now is inflating my road bike's tires; they need to be pumped up to pressures much higher than other types of bikes, and the really irritating thing is getting the pump's connector locked in securely. Removing it is far harder than putting it on ; if you don't do it quickly and cleanly, you'll lose a lot of air pressure and if you put the slightest pressure in the wrong angle, you can quite easily end up bending the delicate valve. I've had to throw away perfectly good inner tubes simply because the bent and weakened valves simply broke. I searched high and low for pumps with metallic screw-on connectors, but drew a blank, till I found exactly what I wanted on a site called http://rosebikes.de I ordered it straight away and got it delivered within a week too! Tested it out and am fully satisfied; the design of the pump makes it easy to use, the connector is perfect, so no loss of pressure or damage to valves and the built-in digital pressure gauge is quite accurate too (cross checked with my Topeak D2 pressure gauge). It supports both Presta and Shrader valve types, without the need for any clunky convertors.  Very happy!