TORX screws were developed to prevent cam out, which is the act of a bit slipping out of the screw head when it reaches a certain torque. By reducing cam out you lengthen the life of the bit and screw head and minimize the risk of damaging the item you are working on. They also allow more precise amounts of torque to be applied. For these reasons, manufacturers in the automobile, bike and computer industries have moved to this type of head. If you regularly work on a car, bike or electronics, a TORX bit is sure to be a necessity.