At times I have had to dig long, narrow trenches for water lines. The pointed end of a pick is a good tool for that, but the pick doesn't remove the dirt as it breaks it up. I solved that problem by making a chisel shaped adapter that fits on the pointed end of the pick. Besides letting me remove the dirt as I dig with it, it also extends the tip of the pick to let me dig deeper trenches.
The adapter is a piece of 3/4" diameter EMT galvanized electrical conduit pipe. It is easy to forge it into shape with a hammer and anvil (or suitable anvil substitute).
The wide blade end of the pick digs a trench that is wider than necessary for laying 1/2" pipe, so it wastes a lot of energy to do the job. This pick extender makes digging narrow trenches a lot easier.
Step 1: Forging the Tip Extender
Cut a section of 3/4" EMT electrical conduit pipe about 5" long.
Stick the pointed end of the pick into one end of the pipe and hammer the pipe down to make a tight fit over it. You can tap it off with a hammer if it gets stuck on the end of the pick -- which it should.
Turn the pipe section around and flatten the other end.
Weld the pinched end and sharpen it with a file or grinding wheel. If you have no welding equipment, you can probably use it as it is, if your ground is not too hard.