When I slit my finger with it, the tetanus shot hurt worse. However, saying that, all of "us" quilters need to make sure our tetanus shots are current. They last 10 years so I am covered now. With all the fabric coming from everywhere on earth now, the doctor said that shot is very important to all of us. After all was said and done, that slit really hurt and cost me $650.00 at the emergency room and just think.....all the fabric I could have bought....sigh.