[Kalzazz]

My former kenjutsu instructor in bygone college days positively extolled the virtues of floor jacks and their handles, he considered the handles to be positively swordlike, logical to carry in the back seat of your car in easy reach (complete with jack), and the floor jack to be infinitely superior to the little bottle or scissor jacks usually found in cars. So in kenjutsu class we dutifully practiced flailing around with jack handles

Combination wrenches should be reasonably balanced due to having a weight on both ends, and come in all sizes

Lengths of pipe used as 'cheater bars' to slip over a wrench would work, since all the batons I've used have just been very light pipes with rounded ends, this would be a heavy pipe with open ends, which would probably knock it from baton up to shortsword