I've just got one on ebay from a Portugese based company called birds and bees online, and its an unusual shape. It has 2 flat prongs. with both prongs about 4cm each wide and both pointed.ITS AMAZING. I have an allotment that hasnt been dug for 20 years, and is heavy clay. A Chillington hoe bounced straight off, but this dug in and sliced the clay like butter.Highly recommended. Zeed