The two most common injuries caused by unsafe knives in the workplace and in factories are lacerations and repetitive motion injuries.Lacerations are the most common injury caused by unsafe knives in the workplace. These occur when a person's body comes into contact with a blade that is being used.Repetitive motion injuries are also common with poorly engineered knives in the workplace. These occur when someone uses a knife repetitively for long periods of time. This can lead to carpal tunnel syndrome, tendonitis, or other musculoskeletal issues.