The Groz Hollow Punches are designed to punch holes in gasket material, leather, rubber, canvas, cardboard, plastic, and other soft materials. With a unique cutting design, they prevent material jamming and ensure smooth operation. The cutting edges are induction-hardened for extended durability, ensuring long life. Crafted from a single piece of machined steel, these cylindrical punches are robust and reliable. Ranging from 3/32" to 1" (2mm to 25mm) in diameter, The Groz Hollow Punches are accurate and efficient, making them an essential tools for precision punching tasks wide range of applications.