The square ruler is made of aluminum alloy, treated with anti-oxidation, has a good structure, and is sturdy and rust proof. Very suitable for any place that requires precise 45 or 90 degrees but may be difficult to use a full-size angle ruler! The angle ruler in the apron pocket makes quick square inspection more effective! The square ruler has three built-in holes, making it very easy to position despite its small size! Of course, if needed, these holes can be used to draw circles. A very convenient small right angle measuring tool! This aluminum square is very convenient for setting 90 degrees or 45 degrees, or for checking squares on small items such as tool blades. Dual scale. This angle ruler has two scales: imperial and metric. The scale of laser engraving is precise, wear-resistant, and easy to read. Without a doubt, this will help you ensure precise squareness or 45 degrees before cutting projects. It can also provide a lot of assistance in woodworking, small DIY projects, handicrafts, scraping construction, or model making. The square ruler is made of aluminum alloy, treated with anti-oxidation, has a good structure, and is sturdy and rust proof. Very suitable for any place that requires precise 45 or 90 degrees but may be difficult to use a full-size angle ruler! The square ruler has three built-in holes, although the size of the ruler is small, it is easy to position and these holes can be used to draw circles. A very convenient small right angle measuring tool! This aluminum square is convenient for setting 90 degrees or 45 degrees, or for checking squares on small items such as tool blades. Dual scale. This angle ruler has two scales: imperial and metric. The scale of laser engraving is precise, wear-resistant, and easy to read. It helps you ensure precise square or 45 degree accuracy before cutting projects, and can also provide a lot of assistance in woodworking, small DIY projects, handicrafts, scraping construction, or model making