The spanner tool is used to tighten or loosen fasteners like nuts and bolts. They offer a tighter grip and amplify the mechanical pressure in applying torque to turn objects. Typically made of metal, it is a small hand-held tool with a metal shaft and the profile on one end. A spanner profile refers to the opening of the jaw that makes contact with the fastener.
The profile in a spanner tool comes in contact with the fastener head while turning the nut or bolt. Depending on the purpose it is designed for, the profile in a spanner comes in many shapes with different sizes of opening. Based on this, a spanner tool is categorized as a ring spanner, combination spanner, or more.