Fiskars Rotary Cutters have top-quality cutting performance. Handle is contoured for comfortable grip. Cuts multiple layers of paper and fabric. The perfect tool for cutting foam board, mat board, construction paper, vinyl, fabric, fiberglass, cardboard and many other materials. Left or right handed. 45mm Ergo Control- Ergonomically sculpted Softgrip handle reduces hand fatigue, longer handle design provides improved control and grip. Blade guard automatically extends when you release the handle, lock secures the rotary blade in either position. Magnetic blade change system is thumb activated.