Torque Multiplier Max Output 1000ft/lbs. features: Ratio: 4:1, Drive output: 3/4 in., Drive input: 1/2 in. and Head measurements: 3.35 in. Increases the range of your torque wrench as much as 14 to 1. Frictional losses in the gear train may cause a torque loss of 10% to 20%. Designed with four pinion gears in a compact housing.We ship APO, FPO and combine shipping.