Adjustable combination square: This product consists of a 300mm steel ruler and an adjustable square head. Suitable for marking 45/90 degree angles, multi-dimensional measurements, marking straight lines and drawing parallel lines. Precise measurement: Use laser technology for high-precision manufacturing and number calibration. The engraving is clear and easy to read. Centimeters and inches on both sides: 300mm metric system and 30.5cm British system. Meet your different measurement needs. Multifunction: Built-in spirit level and metal scribe, the combination square can be used as an angle, depth gauge, scriber and spirit level. It is the perfect helper for woodworking, engineers and carpenters. Durable material: The ruler is made of high quality stainless steel. The corner bracket is made of zinc alloy, which will not rust or corrode, not easily deformed, sturdy and durable.