![](http://img.uaft2404.org/img/sdela-2019/gajkolom-iz-starogo-rulevogo-nakonechnika.png)
An excellent tool for removing old, rusty and broken nuts, which you can make yourself. The steering tip is taken as a basis, it is in shape suitable for this idea. A knife made of a tap pricks a nut; even a broken tap is suitable for a tool. Between a knife and a bolt it is desirable to place a ball from the bearing.
A wrench or a wrench is not often needed, but its use is less fatal to threading than using a grinder.