Hand tools have been an integral supplement to the human hand since the beginning of civilization. Recently, they have been pinpointed as a prominent cause of workplace disease. Cumulative trauma disorders such as tendonitis, carpal tunnel syndrome, and Raynaud's Syndrome are caused by the specialization of motion employed when using a screw driver, the shock to the hand and wrist when a hammer strikes a nail, or the vibration of a power saw. This text explores the relationship between biomechanics, safety, and ergonomics, allowing the reader to recognize, evaluate, and control ergonomic risk...