Tired of getting grease on your trousers or worrying about your bike chain? This simple plastic chainring guard helps. It's designed to fit over a 42-tooth bicycle chainring (the big gear by the pedals). The guard helps keep dirt and grime off the chain, can protect your clothes from getting caught or stained, and might even offer a tiny bit of protection for the chainring itself. It comes with 8 screws for easy installation – you just line it up with your crank arms and screw it on. Made from lightweight, durable plastic, it won't add much weight to your bike. It's a basic, affordable accessory for mountain bikes, road bikes, or any bike with a 42T chainring that could use a little extra cleanliness and protection.