A belt drive is one of the most popular types of power transmission methods besides gears, chain drives, shaft couplings and lead screws. The use of these highly efficient mechanical drives is increasing with every passing year. Fasteners can broadly be categorised as either Permanent or Non-Permanent. Permanent Fasteners, such as rivets and nails, are single-use fasteners that are designed to permanently join two materials or parts. Removing the fastener destroys it.