The Moore & Wright CSM Precision Rules are fully hardened and tempered precision rules with deeply etched graduations on both sides for ease of reading and long life. Theseare rules specifically designed for use with the Combination Sets (MAWCSM300 & MAWCSME12).The Moore & Wright CSRM600 is a 600mm rule is perfect for use with the combination sets and is graduated on both sides. Measurements: mm and 0.5mm on both sides; numbered every 10mm. PLEASE NOTE This is ONLY the Rule.