Every OPEN punch is constructed from lightweight, durable pressed metal. Center indicators to ensure precise punching Plastic bases serve as a waste punch storage area and protect the desk from scratches. Features include: All punching capacities are displayed in sheets of 80GSM copy paper. Side Gauge: Accurate A4 central posting. Slide to the center holds on non-standard paper. Depth Gauge: Modify the holes' depth by adjusting them to 10, 12, and 14 mm from the paper's edge. To punch four holes at equal distances apart, flip the page after adjusting the side gauge to the four-hole setting and punching the sheet. Future-ready spare drill PUB-1 made in Japan that can be replaced