I had never heard of them being called a horn,
This is my breaking cart, I bought it with "horns" on it. About 5 years later, one of the shafts broke right above the right horn and I then bought a piece of muffler pipe to repair it. The horns have lasted since before I bought the cart in 1984, and my muffler repair has been there since about 1989. Copy of carts 009.jpg Copy of carts 017.jpg
Sandy is great at Iowa Valley, She is meeting me at my next show with a handful of different bits for me to try on P.