Adjustable Combination Square:This product consists of a 300 mm steel ruler and an adjustable square head.Suitable for 45/90 degree angles marking, multi-dimensional measurement, marking straight lines, drawing parallel lines. Accurate measurement:Adopt laser technology for high precision manufacturing,Engraving numbers calibration is clear and easy to read.Two-sided centimeters and inches300mm metric system and 12" British system.Meet your different measurement needs. Multifunction:Built in bubble level and metal scriber, Combination Square can be Used as a Square, Depth Gauge, Scriber, and a Level. It is the perfect assistant for engineer, carpenter, woodworking. Durable Material:The ruler is made of high quality stainless steel material.The Angle holder is made of Zinc alloy, which will never rust or corrode, not easy to deform, sturdy and durable. Most Satisfying Service:We sell high quality products to our customers. If the product does not meet your requirements or you have any questions, we will provide you with after-sales service 12 months, please feel free to contact us. 300mm Combination Square