The box ends you will find these days are too fat to get in there. An old Craftsman from the 60s is almost thin enough,but some grinding is still required. The Motion Pro wrench is way too fat but it is necessary to put your torque wrench on. No tighter than those nuts require,grinding won’t compromise the strength of the wrench. However, I keep those wrenches in a special place and use them only for those nuts….don’t want to chance them popping when trying to loosen something really tight.