Basically, it's a plastic blade that is seperated into 2 halves. The inside of those 2 halves has a semitransparent mirror coating applied to it. In the center, between the 2 halves of the blade, is a piece of light sheet, similar to the material used to illuminate watch faces. When you power the thing up, the light sheet in the center glows and shines through the mirror coating of the plastic blade. When the light is off, all you see is the "brushed" mirror coating of the blade, and it looks like it's metal.