2-in-1 Design: Made of laser- technology, the angle finder ruler is clear and accurate for measuring length(0-10 cm/ 0-4 inches). Two Arm Protractor feature with adjustable thumb nut, tightening the nut, easy to measure from 0-180 degrees and read the angle number Adjustable protractor arm: The angle number is easy to identify by knurling thumb nut locking in the desired position, perfect for your basic work and learning needs. you can fix the angle to plot, suitable for setting bevels, draw lines, measuring and marking angles High Quality: Angle finder protractor is made of stainless steel, rust resistant. With good durability, No deformation Multi-: Two Arm Adjustable Angle Protractor is suitable for engineering, angle measurement, student drawing, architectural design, length measurement, as a useful tool for craftsmen, designers, artist, engineers Ruler Measure Length: 0-10cm. Protractor Measure Degree: 0-180 degrees. Dimension: 90mm x 197mm x 12mm Material: Stainless steel colour: silver Package Contents: 1 x protractor 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.