Armstrong 13-128 Standard Length Socket

Armstrong Socket, Standard Length, Series, Measurement System, Square Drive, Drive Size, in 3/4, Socket Size, in 7/8, 1.968 Overall Length, Opening Depth in, in 0.54, 1-3/8 Drive End Width, Socket End Width in, in 1-3/8, Ball Locking, Number of Points, Bolt Clearance Depth, in 0.688, 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
• Socket wall dimensions are optimized to provide strength while retaining access to restricted fasteners