What is this tool? Answered
Today, I had a clear out of the workshop (Okay, shed) and found this peculiar tool. It's being lingering around for years now, and I've never been able to figure out exactly what it is and where it came from.
The orange thing pushes down and locks, and when it is at the bottom a tiny metal rod appears and dissapears again at the end of the white nozzle. It holds in place until you press the orange button, at which point it fires the orange thing out at a fairly high speed, and it stops when it reaches the end of the blue channel. If you cover over the nozzle, it fires very slowly, so it probably sucks air from there.
Does anybody know what this tool is?