Professional-Grade 7″/12″ Heavy-Duty Aluminum Carpentry Square with 45° Angle & 22.5° Half-Angle Markings, 90° Corner Alignment, Length Measurement Scale & Chart Scale – Precision Angle/Length Measuring Tool for Carpentry, Construction, DIY – Durable & Portable with Ergonomic Grip, Clear Scale & Guides (Ideal for Woodworking, Masonry, Tile, Flooring) – Red/Black Design