"Found this metal object in Auckland, New Zealand. Banana, Hot Wheels car and fruit pie for scale! Metal (brass?) with screw thread at the bottom and coloured plastic rings around shaft, some opaque, some transparent. Found on the shoreline at the Ōtuataua Stonefields reserve, near the airport."
A: "I’m sure this is the handle to a machinists hammer. It’s the common item to make when learning how to turn on a lathe. I made one nearly identical when I first started."
We used to make these as kids by taping a cut off balloon to a broad piece of pvc pipe. They can shoot things away really hard. Funny to see a commercially made one. I bet you can easily take someone's eye out with those metal balls.