General description Made of high-quality carbon steel, this 6-piece hollow punch set features a hexagonal handle that is strong and durable, ensuring it will last for many years. The drill bits are designed for efficient leather hole making, with a knurled body for a secure grip and precision ground grooves and cutting edges. This versatile tool can easily drill holes in various materials including cardboard, plastic, fabric, and leather. Technical specifications Material: Carbon steel Color: Black Sizes: 5mm, 6mm, 8mm, 10mm, 11mm, 12mm Measurement allowed error: +/- 1-3cm Usage No need to press hard; the bits glide through layers of leather, fabric, and foam. Installing grommets is easier without excessive hammering. Use cardboard as a base to maintain the edge of the hollow punch. Other information