Features: The body is made of materials, which is not rusted and not deformed. In the area of microprocessing, the technique of laser technology is used for high precision manufacturing. Corrosion-resistant scale, clear fonts. Mobile multi-azimuth measurement.Big blister design. Suitable for measuring, marking out, Woodworking, laying out etc. Description: Name: 300MM adjustable protractor combined square ruler Attention Tips: If the mobile phone client can't check the size clearly, please collect it and transfer it to PC Client, it would be much better. Suitable: Measuring, marking out, laying out etc. size: 300MM Material: Stainless steel + aluminum alloy colour: As shown Package Contents: 1 x Combined Square Ruler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.