BACKGROUND

Hand held drivers, such as screwdrivers, are commonly used to torque fasteners and fastener components, such as various types of screws, bolts, nuts, and others. In one example, a hand held driver can have a driver shaft with one end configured as a driver head to interface with and engage an interface portion of a head of a fastener. The hand held driver can further comprise a handle in support of the driver shaft, and configured to be grasped by a user, such that the user is able to manually apply the needed or desired torque to the fastener or fastener component via the hand held driver. There are a variety of different types and configurations of hand held drivers, including, but not limited to, flat and Phillips drivers, nut drivers, star drivers, and hex key drivers. In addition to differing driver types and configurations, there are a variety of sizes of drivers. As such, a wide range of hand held drivers are available to interface with the various types and sizes and configurations of available fasteners.

The relative size of a driver handle is often related to the size of the driver and the application in which the driver will be used. Larger drivers with larger handles are often used in areas with adequate space, while smaller drivers are often used in areas with less space, requiring a smaller handle size.

An operator's daily use of high torque drivers can result in arm, wrist and/or hand pain. An operator using a driver to fasten a fastener for whatever purpose, such as assembling machinery or joining component parts, may be required to torque a fastener a pre-determined amount. Some hand held torque drivers can provide operators with an indication of the amount of torque applied to a fastener, thus notifying the operator when to stop tightening the fastener. Such hand held torque drivers typically need to be calibrated to ensure that the torque settings are accurate and that fasteners used with such drivers are being torqued properly. The process of calibrating a torque driver often calls for a technician to insert the driver shaft into a calibration tool and torque the tool throughout a range of torques. This calibration process may require a technician to repeatedly torque multiple drivers in the calibration tool on a daily basis. Moreover, there are many instances that require individuals to repeatedly use hand held drivers, such as to complete various tasks or to perform their jobs (e.g., assembly line workers, and others). Such repeated hand and wrist motions by any individuals using hand held drivers, particularly over time (e.g., hours, days, weeks, months, or even years) can result in injury. Minor injuries to ligaments, muscles or tendons in the arms, wrist, and/or hand can include fatigue, soreness or swelling. More significant injuries to ligaments, muscles or tendons in the arms, wrist, and/or hand can include sprains or more lasting strains. Major injuries can involve the nerves, where certain repeated motions by an individual can result in carpal tunnel syndrome, osteoarthritis, and tendonitis.

