Fastening strips, also known as battens, are thin strips of material used to secure objects together. They are commonly used in construction, carpentry, and other industries to hold two or more objects together. Battens are usually made from wood, metal, or plastic and can be used to join two pieces of material, such as wood or metal, or to attach one object to another. They are also used to reinforce walls and roofs, and to provide additional support for structures.