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 measurement, marking straight lines, drawing parallel lines. Precise measurement: Adopt laser technology for high precision manufacturing, digit calibration engraving is clear and easy to read. centimeters and inches on both sides: 300 mm metric system and 30.5 cm British system. Meet your different measuring needs. Multi-Function: Built-in spirit level and metal scriber, the combination square can be used as a square, depth gauge, scribe and level. It is the perfect assistant for woodworking, engineers, 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.