Really fun to find these, purchased from the same Lancaster, PA dealer as a great mid 19th c. crooked neck Knickerbocker stoneware beer bottle that I listed and sold last week. I know from him that they are couplers (joining pieces) from an early American buckboard wagon, which at some point accrued two eyes each, transforming them into snakes! Beautiful forms and very satisfying physicality to the iron to begin with, and of course all the better animated with creature-hood. Found together and I think excellent as a pair, lending themselves to all sorts of configurations, including evocative interlocking ones! 

Approx 3 5/8 x 2 3/8 x 1 1/2" t each. Great antique condition. Sold as a pair.