Bolts are fasteners used to join two or more objects together. They are typically made of metal and are characterized by a threaded shaft with a head at one end. Bolts are commonly used in construction, manufacturing, and mechanical engineering to provide a secure and strong connection between two or more objects. They are often used in conjunction with nuts and washers to provide added support and stability. There are many different types of bolts, each with its own unique features and applications. Some common types of bolts include hex bolts, carriage bolts, lag bolts, and eye bolts.