This Standard provides general dimensional and functional characteristics for wire twister pliers, which are used primarily for twisting safety wires (lock wire) on critical equipment on aircraft, automotive equipment, and for other similar applications. Inclusion of dimensional data in this Standard does not mean that all pliers described herein are stock production sizes. Consumers should consult with manufacturers concerning lists of stock production sizes. This Standard may be used as a guide by state authorities or other regulatory bodies in the formulation of laws or regulations. It is also intended for voluntary use by establishments that use or manufacture the covered tools.