To measure distances with maximum precision and convenience, the laser level or laser measurer is the right instrument. It is a measuring tool widely used in construction and installations due to its high accuracy and ease of use. It is ideal for professionals, although it is also very useful for domestic use in simple DIY tasks. If your need is to determine whether a surface or element is flat, the most suitable tool for you is the spirit level. Specifically, it is a glass tube filled with alcohol or ether containing an air bubble that moves to indicate how straight the element or surface is.