Our adjustable rulers allow you to take precise and accurate angle measurements in either metric or imperial. The grooved adjustment knobs are easy to turn making it simple for one handed use. The markings and numbers are laser etched on to the ruler surface making it difficult to wear off over time. The longer ruler has markings up to 250mm and the smaller mruler has markings up to 120mm. The metric markings are in centimetres with increments in millimetres and the imperial markings are in inches with increments in 1/16th and 1/8th of an inch. Ideal for crafting, DIY, graphic design, tiling, etc.