Metal blade ceiling fans are spinner ceiling fans with metal blades, most of the time containing three blades, some manufacturers did offer four metal blade ceilings fans as well. Imported Asian factories in the 1960s started to produce metal blade ceiling fans, which were and are very common overseas. Asian factories such as Wing Tat and S.M.C. to name a few have been making metal blade ceiling fans since the 1960s. Asian factories also made a four wood blade version of their metal blade ceiling fans using the same motor etc. In the United States, metal blade ceiling fans were all over the market back in the 1970s and early 80s. Many consumers were purchasing them for their homes and installing them in their bedrooms, living rooms, and kitchens, etc.. These fans were quite dangerous for homes. Blades are metal, most meta; blade ceiling fan motors move the blades at a high speed. Any body parts were caught in the blades such as fingers, hands, arms, could end up with a cut or bruise. Many metal blade ceiling fans are not seen too much any more in homes, other than a garage or utility room, as most have upgraded to a newer style ceiling fan. Back in the 70s and 80s most metal bladed fans were marketed as standard ceiling fans. In today's world they are known as Industrial ceiling fans.