1、Free Measurement: This 7in woodworking triangle ruler will largely simplify your measurement in length, angle, positioning, marking and so on. 2、High in Accuracy: Designed to have removable base, the carpenter square also has a sliding ruler and various scales for higher work accuracy. 3、Has Bubble Level: Moreover, there is a bubble level on the triangle ruler, which can be used for leveling and trimming, useful and reliable. 4、Wide Application: Allows for application on cutting, hemming, installation, assembly and varied woodworking projects with great efficiency. 5、Using Good Steel: Consisting of premium stainless steel and carbon steel materials, the angle ruler is not easy to break and very durable.