This is an old post hole borer that attaches to the back of a tractor. It is not used very much any more, as often fence posts are rammed into the ground with much bigger machinery.
I've never seen such an attractive post-hole borer/auger. You've caught the light beautifully and the various greens just glow. Lovely shot. You should check out the eye of the beholder challenge.
(Linda @se7en )
(Linda, @se7en , Mondays)