This cutter set has below characters: 1. shaft length: 1300mm, cutter's diameter: 310mm. 2. 2 million pieces diapers output for one time. 3. knife is made of high speed steel, and can be re-sharpened for more than 10 times, even 20 times according to customer's design, with best life span, can cut 30-50 milllion pieces above.