This Q-Max sheet metal cutter/hole punch is a versatile tool with a 40mm diameter round shoe size. It is perfect for cutting holes in sheet metal for various applications. The tool is designed for easy and efficient use, and its durable construction ensures longevity. The manufacturer part number for this tool is 40MM. Whether you're a professional or a DIY enthusiast, this hole cutter is a must-have tool in your collection. Its sharp edges and sturdy construction make it ideal for cutting through thick and thin sheet metal with ease. With its compact size and ease of use, you can take it with you to any job site. Get your hands on this Q-Max sheet metal cutter/hole punch today and take your woodworking projects to the next level.