Whenever you buy a router, table saw, lathe and some other tools, it is common to get one or more wrenches for changing bits, blades, chucks, ... These tend to be some of the cheapest most poorly made wrenches I have ever seen. The wrenches that came with my lathe literally spread further open when I applied moderate pressure, making them completely worthless. I had to spend over an hour with a Dremel grinder to correct problems with the wrench that removes my arbor nut on my table saw.
When you spend hundreds of dollars on a nice tool you should get a decent set of wrenches to change what ever needs changing.
-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.