Easy to Use: The set includes 2 piece of 12 inch (30cm) ruler and 2 piece of 6 inch (15cm) ruler. For easy measurements there etches on either surface of the rulers two rows of graduations on the upper and the lower side. Precise Metric and Imperial Graduations: On both the 12 inch and 6 inch metal rulers the graduations are accurately etched in inches on one surface and centimeters on the other. Graduation of inch is marked by every 1/20 inch and 1/32 inch for the first 2.5/3 inches; then marked by every 1/10 inch and 1/16 inch. : The rulers are made of industry grade stainless steel to prevent rust and corrosion. The graduations are itched for long duration. Widely Used: The rulers are commonly used for marking and measuring. They are a must have for , architects,engineers,drywallers, DIYers, students, teachers, office workers and more. This stainless steel rule set includes one 12 Inch and one 6 Inch ruler to use in different environments. Stainless steel will last a lifetime. The rulers 't get pitted and worn like plastic ones. And the rulers have imperial and metric measurement units, perfect for use in workshop, school, home and office. Length: 12 inch (300mm), 6 inch (150mm) 12 inch Dimensions: about 33 x 03.5 x 0.5cm 6 inch Dimensions: about 17 x 2 x 0.5cm Material: Stainless steel Thickness of each ruler: 0.7 mm/ 0.03 inch Color: Silver Package Included: 2 x 12 inch ruler 2 x 6 inch ruler Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.