This is a 45mm OLFA rotary blade cutter, Made in Japan. This rotary blade features an ergonomic design for easy and comfortable use. From the OLFA website “Use the Ergonomic Rotary Cutter on a multitude of materials, including wool, cotton, vinyl, leather, paper, and more. The sharpness of this blade allows for cutting of up to eight layers of cotton fabric in a single pass.” This rotary blade retails for $35 online on the OLFA website.