Description: 【Versatile】: This aluminum alloy square ruler is designed for multiple uses, making it an essential tool for woodwork and other tasks 【Material】: Crafted with a thickened aluminum alloy base, this square ruler is built to withstand wear and tear. It offers resistance to impact, abrasion, and corrosion, ensuring long durability 【 Engraving】: The Woodwork Square Ruler features engraved markings that are clear, providing accurate measurements every time 【Innovative Hidden Scribing Pin】: Woodwork Right Angle Ruler with a hidden scribing pin design, prevents accidental injuries while allowing easy installation and removal as needed 【User Friendly】: With conveniently placed marking holes for both size and angle measurements, this Carpenter Square Layout Tool simplifies the process of marking dimensions accurately Size Chart:30cm/11.81inch Package Includes: 1 Woodwork Square Ruler Note: Please allow slightly errors 1-2cm differences due to manual measurement.