Step 1: What you can buy
Step 2: The working end of the key
Step 3: My finished meter key from scraps
A note on use of the water meter key: In our part of Idaho we have little rainfall. Our water for irrigating our lawns comes through a system of underground piping about 10 inches in diameter. It is fed by water in reservoirs from spring snow melt in the mountains. Once a week we open the valves in the backyard and flood the entire lawn with about 3 inches of water. The meter box fills with irrigation water and the shut off valve silts over so that it is not visible. My longer meter key is handy for poking around to find the shut off valve in the muddy silt.
Step 4: Making a straight shank
Step 5: The handle
Step 6: The working end of the key
I have not needed this water meter key often, but it works very well. And, I used up some scraps I had without a penny out of my pocket (other than for welding electrodes).