HIGH QUALITY: The ruler is made of stainless steel, practical and durable. GOOD DESIGN: Designed with a locking button to lock the angle in any position. ADVANTAGE: Clear scale, quick and easy to read measurement. Available in three sizes, meeting your different demands. EASY TO USE: 2-in-1 ruler and protractor for easy measurement. 0-180 degree Angle Finder Gauge goniometer protractor stainless steel bevel protractor goniometer digital inclinometer goniometer digital angle measurer 0-180 free rotation0-180 range can be arbitrarily adjusted and measured, marking Adjustable screw design Fixed readings, screws can be tightened, easy to operateSpecial process laser engraving Special technology, clear, precise and convenient reading High quality stainless steel Made of steel stainless, sturdy and durable, not easy to rust Soft and precise edge grinding The edge is smooth, the tilt angle, the measurement is accurate, the angle tilt is sharp, be careful when using Specification: material : stainless steel Measuring range: 0-180, 0-15cm / 0-5.91in Package list: 1 * protractor ruler