Designed with a comfort grip and anti-roll device, the OLFA Art Knife comes with 3 types of blades: Precision, Chisel, and Curved Carving blade. This OLFA art knife is designed to fit perfectly in your hand for the best cutting experience. The slightly weighted bottom provides for ideal balance and stability in your hand. In addition, all of these great features, including the anti-roll safety mechanism, will allow you to finish your art project safely and smoothly.