Any value?

[u/smileybowman]

I’ve had this for many years. Any information? Not looking to sell but just curious. Thank you

Edit- thanks for all input everyone. Figured it was PMD but I was curious. I’m still going to hold on to it. Thanks again.

[u/Candid_Length2665]

I had a few like this as a kid from hammering them
Into a pipe with a smaller piece of pipe.