Its (mostly) metal (there is a cosmetic plastic fairing to the spider arms), the steel (not aluminium) chainrings are riveted on, and it's (gasp) – a triple! Really well made. A tad heavy. The price is amazingly attractive. Does not come with a bb, so you have to buy that separately. If you can live with the 40-30-22T, it's a good buy. The chainrings have 'pinned ramps' to help the chain shift. Not as glamorous as XTR (definitely heavier), but nothing lasts forever (especially in MUD), and unless one is a factory pro, this is a decent product at a great price (yep, repeating myself).