The brake line wrench proved to be a workable solution to the problem presented. The prototype proved its ability to apply more torque, during testing, to a brass test piece than an ordinary open-end wrench. This brass piece was used to simulate a brake line fitting. The brake line wrench prototype also meets the necessary requirements defined in the problem. Over all the design was a success.

The design consists mainly of two components the wrench, and the key. The wrench can be broken down into two major sections. One section is the handle and the other is the head. The head of the wrench contains some highly detailed characteristics such as the hexagon, the slot, and the channel. The key is a very simple piece of stock machined down to size to fit in the slot of the wrench. Both the wrench and the key were made out of cold rolled steel. The specific details with in the head of the wrench were made using the Bridgeport milling machine along with the key. The exterior details of the wrench were of less importance and were obtained by using the vertical band saw and the vertical sander.

Some important results produced during testing helped to re-insure that the prototype was a success. A conventional wrench applied a torque of about 71NM to a hexagonal shaped brass test piece. While the prototype wrench applied a torque of about 201NM to the brass test piece. These results show the increased efficiency obtained in brake line wrenches when all six sides of the brake line fitting is utilized. Other important characteristics pertaining to the wrench prototype are as follows. First of all the wrench performs well. Second, it has the ability to open and close. Third, it weighs 1.26 pounds which is less than the given weight requirement. Lastly, it has a smooth outer finish that is shiny and appealing to the eye.