It's plastic but it feels well made and pumps tyres up fine. Very good value for the price. The supplied clips will only fit fairly narrow tubes, but they can be strapped on with a couple of cable ties easily.
Only just got round to using it, and the handle is very flimsy. Worst thing is the valve piece does not work/is broken and just lets air out no matter how much it is tightened (tried two bikes-4 tyre valves).