We use a 17mm 3/4” drive as we have “Bertha”, an old girl air gun but she puts out 500lbft of torque so not much beats her, tightening needs to be more controlled so we use a 3/4” drive long arm bar which is 5 feet long and even then strong words are said “putting on the angle” which is usually 180 degrees, so often it is 180Nm plus 180 degrees.