"I'm going to attempt to reforge this glaive into a 4-star weapon." Borris said with a clear voice allowing his grandson to catch his words despite this loud cacophony of clanging metal and roaring furnaces in the area.
"Oh I see that would certainly help Mr Frost when he's fighting the B-rank monsters, they really do need 4 star wea....wait what!!!!" At first his grandson didn't get the impact but after a second it hit him like a sledgehammer, and he stared at his grandfather in shock.
A 4 star weapon, being able to forge something of that standard would separate one from the chaff, one would truly become a master of their craft.
Anything below 4 star was rather common even Furano given its boonies location had multiple smiths that could produce good quality 3 star equipment. It even had Borris and another smith who could occasionally create half step 4 star equipment and this was just one town out of many in the empire.