Iron plates have so many benifits for those of you who are into fitness 1st, its iron that makes it virtually unbreakable; you can abuse the thing over and over and you'll never feel that it's worn out 2nd, its made with high precision hence every plate fitting onto bar is perfect without (or less) tolerence gap between during workouts which increases your stability while working out 3rd, incremental weight increase possible with these kind of plates but there's none matching your maturation growth 4th they're user friendly. Its also their final advantage: comfort Last point on why its fun.