Armstrong® Socket, Standard Length, Series, Measurement System, Square Drive, Drive Size, in 3/8, Socket Size, in 11/16, 1.013 Overall Length, Opening Depth in, in 5, 0.952 Drive End Width, Socket End Width in, in 0.952, Ball Locking, Number of Points, Bolt Clearance Depth, in 0.696, High Alloy Steel, Finish

• Radius corner design engages the flats of the fastener, not the corners, providing up-to 15 to 20% more torque while reducing fastener rounding, enhancing the turning of worn fasteners
• EYE-D™ markings optimize size visibility, also providing SAE/metric differentiation
• Unique socket retention method, cold form ball recess, provides consistent secure retention of the socket to the drive tool eliminating the possibility of either a loose fit or tight fit
• Socket wall dimensions are optimized to provide strength while retaining access to restricted fasteners
• Manufactured from high alloy steel using the most up-to-date manufacturing process and heat treat for greater strength and durability

• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Armstrong_21_042D_Specification_Sheet.pdf https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Armstrong_21_042D_Specification_Sheet.pdf