Review on RUKO 106200 Speed Steel Bi Metal: Unleashing the Ultimate Cutting Performance by Timothy Louis

I bought these to cut 1/4" sheet steel to make 8" wheels (I used cut outs, no hole). My drill press and used 30 -W motor oil as a lube/coolant I was in no hurry to cut through the plate It wobbles a bit (top/bottom not centered) For that reason expect the hole to be a bit larger It did its job and is still sharp I believe its quality is inferior to the US made crowns but it was less than half the price of a US made crown.