What brand of guns are "1911" grips made to fit? online i keep seeing "1911 grips" but with no gun makes.?

there are numerous makes of guns that are on the 1911 frame, so what brands are these made to fit? they cant fit all because the grips are different on most 1911 style guns. take midway.com. they have hundreds of generic 1911 grips, but not specific to any gun.