It's made from nails that are used to put horse shoes on horses. It was a very common art use in the mid 60's to late 70's. C. Jere AKA Curtis Jere was a popular mid century artist that made many bronze sculptures. If you research him you will find various other artist from the same era. It is actually a fairly easy piece to replicate if you know a good artistic welder.

they had a very nice one at savafieh but not sure they still have it