Very sharp. I also want to use it for cutting thin vinyl and the like. Actually, since I searched for this item as a sewing machine rotary cutter at the time of search, I bought it as a whole because it seems to be a bowl. It was a failed item that I purchased without considering details. After we opened it, I understood it, and as a result of examining how to use it, I decided to use it for notation. I wish there had been a replacement blade for this product in this product.