Made to EC Class 1 standard, these are amongst the most accurate rules we have ever offered. They are hardened stainless steel rules with an anti-glare pearl chrome finish. Their permanently etched graduations with black infill are clear and easy to read. They have millimetre graduations on the upper edge and half millimetres on the lower, numbered every 10mm. The rules read zero from the left-hand end and feature a hanging hole at the opposite end. The 600mm rule is 30mm wide by 1.0mm thick.