PREMIUM MATERIAL - Made of solid steel, strong and rustless. It has the characteristics of strong penetrating power, durable and not easy to damage. ERGONOMIC DESIGN - Ergonomic low-effort handle allows for punching through material by hand or on a table. SUITABLE FOR - Capable of penetrating materials up to 60 mils thick, ideal for students, teachers, office workers, designers, artists and more. SUITABLE FOR - Ideal for making gift cards, paper crafts, ID cards, lamination, scrapbooking, photo and PVC etc. NOTE: In the event of an accidental paper jam, you can recover it by pulling the two handles of the rounder. Unless you want an irregular shape, install as pictured before use to avoid the dreaded rounded corners.