The reason that people use socket wrench is immediately clear:For one thing, it means an increased efficiency. The user can instantly vary his sockets without needing a separate tool--a great time-saver in any job. Secondly, with an array of socket sizes it is an all-in-one set, meaning you never need to rely only on one tool for each job. Thanks to its flexibility and variety, there's no need to take time out and head back to the store just becuase it has some part in excess of your normal range--everything is here within one package. Third, the tool comes with extensions and adapters that help you get into tight areas which is quite practical for some of the more difficult repairs. In addition, the hand grip of the wrench is designed so that both it and its head can be brought into alignment with your hand position at all times. This way your wrist will never need to bend or twist--important when one is working long hours without a break. Durability is another major selling point. A set of good quality socket wrenches can once and again make travels with you abroad, providing long-term practical solutions to a wide range of binding difficulties across the board.