The striker is a hitting device that attaches to the fence and allows the hitter to practice his/her swing. The device originally connected to a fence by hooking elastic cords to the device, then stretching the cords, and hooking the other end to the fence. This procedure was awkward to do with only two hands and it required too much time to adjust the height of the device.

The goal of this project was to modify the original striker by developing a new way to fasten it to the fence, and by developing a way to adjust the height of the ball without disconnecting the entire system from the fence. This was accomplished by going through a complete design process. First, a functional decomposition and morphological chart were developed to analyze the problem and come up with different ways to accomplish these modifications. Some of the major requirements of the design were that the device would be adjustable, durable, fits to the fence, attaches easily, and does not move on the fence.

Next, multiple concepts were developed that satisfied these design requirements, and a decision matrix was performed to help select the best design. Then, the best design was determined, further developed, and finally built. The final design consists of a vertical adjusting post that the striker slides up and down inside, two horizontal supports to stabilize the fence, and angled blocks on the opposite side of the fence to fasten the device. Its main features are a fastening system that securely fastens the device to the fence, and a 2 ½-foot adjusting range. This range is large enough to work on the extremes of the strike zone.