Torque Multiplier, Max. Rated Input 250 ft-lb, Female Input Square Drive 1/2 in/ OVERALL LENGTH: 8.531 INCHES NOMINAL TORQUE CAPACITY: 750.0 FOOT-POUNDS MAXIMUM DRIVE SURFACE SIZE: 0.500 INCHES NOMINAL FIRST END DRIVE SURFACE SIZE: 0.750 INCHES NOMINAL SECOND END DRIVE END SHAPE: SQUARE FIRST END INTERNAL DRIVE END SHAPE: SQUARE SECOND END EXTERNAL GEAR RATIO: 4 TO 1 SPECIAL FEATURES: SINGLE STAGE PLANETARY GEAR; 227 FT-LB MAX INPUT TORQUE; 750 FT-LB MAX OUTPUT TORQUE; TUBULAR REACTION BAR MATERIAL: STEEL OVERALL SURFACE TREATMENT: OXIDE OVERALL STYLE DESIGNATOR: 139 GEARED