The summary for this bit says it can cut plaster up to 1 inch. The picture looked like the cut surface was about 1/2 the length of the drill. He also said the bit was 1.75 inches long. What I received was a 1.5" bit with a 1/2" cutting surface. It won't cut 1 inch thick material which is why I bought it. Misleading image and description for this product.