GOOD QUALITY: Excellent stainless steel forging, the ruler is made of high quality stainless steel material, The Angle holder is made of aluminum alloy, which will not rust,not deform. thickness is 2mm, sturdy and durable for long time use WITH ADJUSTABLE SQUARE HEAD: Consist of a 300mm steel ruler and adjustable square head for accurate measuring. Helping you to make a true accurate angles and lines with the ruler and head HIGH Accuracy MANUFACTURING: Adopt laser technology for high Accuracy manufacturing, double sided ruler in mm and cm scale gradations.Embossed graduation for easy reading and durability, Suitable for measuring, marking out, laying out etc MULTIDIMENSIONAL MEASUREMENT: Multidimensional measurement, can realize level measurement, 90 Angle measurement, the 45 degree Angle measurement. can be used as a 45 degree miter, height or depth gauge MOVABLE DESIGN: This movable combined Angle ruler is with the design of bubble level. Save a lot of tools for measuring, make your workbench clean and tidy, very convenient to use