This SAE Metric Aerospace Standard (MA) provides dimensional@ performance@ testing and other requirements for high strength@ thin wall@ double head box and combination wrenches which possess an internal wrenching design so configured that@ when mated with hexagon (6 point) fasteners@ they shall transmit torque to the fastener without bearing on the apex of the fastener's wrenching points. This standard provides additional requirements beyond ANSI B107.9 appropriate for aerospace use. Inclusion of dimensional data in this document is not intended to imply all of the products described therein are stock production sizes. Consumers are requested to consult with manufacturers concerning lists of stock production sizes. Classification: Box and combination wrenches covered by this document shall be of the following types. a. Type I: Box Wrench@ Double Head: (1) Class 1: 15??ffset each end (a) Style 1: Regular length (b) Style 3: Long length (2) Class 2: Deep offset each end (a) Style 1: Regular length (3) Class 3: Modified offset each end (a) Style 1: Regular length (b) Style 2: Short length b. Type III: Combination Wrench@ Open End and 15??ffset Box Opening: (1) Regular length (2) Short length (3) Long length (4) Extra short length