Where to start? The blades (or at least the one in the grip) rusts really quickly, but are REALLY sharp even with the rust. I built 3 plastic kits since I bought this, and they look worlds better than my older ones. My biggest concern was that I'd cut myself by accident when I stated, but apparently I have thick skin, because I scratched myself when it was fresh out of the package and I was not cut. DON'T LET CHILDREN PLAY WITH THIS! IT IS SHARP, MORE SO THAN NORMAL EXACT-O KNIVES.