Carpenter Square Precision for woodworking: Good for precise woodworking measurements and a musthave tool for any professional or DIY enthusiast. Durable construction: Made with quality aluminum alloy and anodized surface treatment, this tool is resistant to wear and tear. The added hole feature provides additional measurement options. Broad suitability: Whether you are a professional carpenter or just starting out in woodworking, this ruler supports accurate and precise measurements. Versatile applications: Use it for measuring angles, marking cuts, and laying out 45/90 degree layouts. It is suitable for both small and large woodworking projects. Use scenarios Measure angles and mark cuts on stock pieces for cabinets, frames, or furniture. Lay out 45degree and 90degree layouts for frames, trim, and joints. Check and reference measurements across projects of varying sizes, from small to large.