I have a red bmx bike with flat plates on both sides in the front it has circles through them I don't know what kind of bike it is it's just the frame I bought from a friend he said he thought it was a diamond back but I never seen one of them made like this one can anyone help me out. Thanks
It looks a lot like a bike made by Giant branded in different ways for different markets.
There are several frames made with a circle cutout and a sort of X shaped gusset. The circle in the middle with a rolled edge is rare.