eBoot Stainless Steel Ruler 12 Inch and 6 Inch Metal Rule Kit with Conversion Table The set includes 1 piece 12 inch (300 mm) ruler and 1 piece 6 inch (150mm) ruler Metric and Imperial Graduation; With conversion table on the back side Clear marks for your convenient measurement Stainless steel material for your long lasting use 0.9 mm thickness avoid sharp edges