Open end is a term used to describe a type of fastener that has no end or cap. It is commonly used in the manufacturing industry for items such as screws, bolts, and rivets. The term 'open end' is also used to describe a type of wrench that has two open ends, allowing it to fit around a variety of different sizes of nuts and bolts. The crossword solution TOED is an acronym for 'Threaded Open End Design'. This type of fastener is designed with threads on both ends, allowing it to be securely fastened into place.