Woodworkers, this circle ruler is one of those tools you'll wonder how you ever managed without! Made from industrial-grade aluminum alloy that feels sturdy and durable in your hands without being too heavy. The 300mm maximum radius gives you plenty of size options for various projects - perfect for drawing arcs, circles, or curved patterns. The engraved scales show both metric and imperial measurements, making precise marking super easy and accurate. The brass knob is a nice touch - it prevents the ruler from rolling around on your workbench and adds stability when you're using it. The markings are clear and well-etched, so they won't wear off with regular use. I've used mine for everything from laying out furniture curves to creating decorative patterns and even checking existing curves for accuracy. It's become one of my most-reached-for layout tools in the shop. The quality is much better than I expected for the price - it feels like a professional-grade tool that will last for years. Whether you're a serious woodworker or just enjoy DIY projects, this circle ruler makes curved work so much easier and more precise than trying to improvise with makeshift compasses. Definitely recommended for anyone who works with curves or circles in their projects!