The term 'fastening tool' can refer to two different tools: a CLAMP and a stapler gun. A CLAMP is a device used to hold two or more objects together, usually by applying pressure. It is typically made of metal or plastic and is used in a variety of applications, such as carpentry, woodworking, and metalworking. A stapler gun, on the other hand, is a handheld device that uses staples to join two or more pieces of material together. It is commonly used in upholstery, bookbinding, and papercrafts. Both tools are essential for many types of projects and can be used to quickly and securely fasten materials together.