Premium Material: The square spirit level is made of special acrylic and ABS materials, it is as clear as crystal and the measuring direction is easy to identify. When a bubble deviates from its central position, it is necessary to adjust the position of the object to return the bubble to its central position. Main Function: This mini spirit level is mainly used to measure the flatness and verticality of objects. Check whether the tested object is parallel to the horizontal plane and whether it is tilted left and right. Easy to Use: Simply place the round bubble of the spirit level where it needs to be measured. When the spirit level is placed on a horizontal surface, the bubble will stay in the middle of the tube and you can determine whether the object is horizontal. Package List: This square column level is small, easy to carry, store and transport. With high accuracy, allowing quick and accurate measurements. There are two black lines inside, widely used for professional measurement and daily use. Wide Application: Our small spirit level is widely used for leveling photo frames, art photo frames and murals, hanging paintings, set-top boxes, levels, panoramic heads, precision instruments, etc.