[Durable Aluminum Alloy Construction] Constructed from high grade aluminum alloy this ruler features a anodized surface available in vibrant red or blue. [Innovative Porous Structure] The ruler body features an innovative porous design for quick positioning and accurate marking. [Adjustable Drawing Pin] Equipped with an adjustable drawing pin this ruler can be inserted into corresponding angle holes to form preset angles including 22.5° 30° 45° 60° 67.5° and 75°. [Precision Multi Angle Measuring] This versatile ruler boasts three sided accurate imperial scales enabling precise line drawing at multiple angles. [Versatile Utility Tool] This multifunctional positioning ruler is perfect for locating positioning line drawing length measuring and angle drawing., Manufacturer: ACOGEDO