We get up in the 2 1/2'' range on some of our farm machinery.Things like the nut holding disk gangs together.When a bearing goes out you have to remove the nut that is rusted and then get it back tighter then tight when putting it all back together.So the disk blades are not loose and spin on the shafts with this nut on the end.Takes a powerfull impact and a hefty air supply to get things back to tighter then tight.