Step 2: Drive in the nails

There’s not much to it, just drive the nails in with a hammer.  Make sure that the nail lines up with the hole on the opposite side of the pipe.  If you try to bang it into solid metal, the nail will bend. 

This is so cool! I'm planning to build myself a backyard garden shed. This will be perfect for compacting the ground before I pour the gravel and concrete for the floor. Plus I like to idea of making your own dumbbells. Way to go!
Nice simple traditional tool. A slight improvement would be to add a "T" handle. Do remember to wear steel toe boots or shoes, could be a mite painful otherwise.
What ever you do don't use a cannon shell from WWII like this guy father did, <a href="http://www.darwinawards.com/darwin/darwin2010-05.html" rel="nofollow">http://www.darwinawards.com/darwin/darwin2010-05.html</a>
How long do you think this should cure before use? Do you have to spray it with water during the cure process?
I added mention of curing in the final step. Thanks for mentioning that detail.
You are right about curing. It's hardest if it stays wet for a few days. I suppose you could just leave it inside the plastic mold for a few days before exposing it to the air. You could let the head soak in a bucked of water.
FYI, another use is tamping dirt around wood posts when doing fencing. Nice job.

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Bio: I'm a refugee from Los Angeles, living in backwoods Puerto Rico for about 35 years now and loving it. I built my own home ... More »
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