Swordfish 80020 Stainless Steel Measuring Scale Ruler Sae & Metric Extra-long 40" (1 meter) ruler for drafting, drawing, plans, arts & crafts 18-Gauge (1.2Mm thickness) and 38mm width stainless steel One side in SAE, another side in metric Metric side marked by 0.5Mm (up to 10cm); SAE side marked fractional inches by 1/32 & 1/16" High contrast engraved markings & numbers won't wear off; 0-40", 0-100cm