The Stanley 60R Line of Chords Engineers Steel Folding Rule is a specialist measuring tool designed for engineers and tradespeople who need to accurately determine angles and calculate circumferences. This 600mm (24 inch) precision rule combines traditional linear measurement with advanced geometric scales, making it an essential tool for metal fabrication, engineering workshops, and technical drawing applications. The line of chords scale runs from 0° to 120° in half-degree increments, allowing users to set or measure angles with precision. Two centre dots are provided on each blade, which work in conjunction with dividers to either set the rule to a specific angle or determine an existing angle. This functionality is particularly valuable for pattern making, template work, and technical layout tasks where accurate angular measurement is critical. One side of the rule features subdivided millimetre markings alongside the line of chords scale, whilst the reverse displays subdivided millimetres with a circumference scale. The circumference scale enables quick calculation of a circle’s circumference by simply measuring its diameter, eliminating the need for manual calculations on site. The rule arrives packed in a protective display wallet for convenient storage and transport. Features and Benefits: • Line of chords scale from 0° to 120° in 1/2° increments for precise angle setting and measurement • Circumference scale calculates circumference directly from diameter measurement • Two centre dots on each blade work with dividers for accurate angular work • Dual-sided metric scales provide versatile measurement options • Steel folding construction combines durability with compact portability Specifications: Length (mm): 600 Metric/Imperial: Metric