Nexify Chainring Crankset Guard with Bike Chainstay Protector - Universal Bicycle Plate Shield - 42-44T VERSATILE GUARD PROTECTION - Keep pants from getting caught in the chain and sprocket, reduce grease transfer and improve riding safety. PROTECT CLOTHES - Not only does it enhance rider safety, it can protect your pants or garments from oil while riding?important if you cycle to work! EASY INSTALLATION - There's no need to unscrew the crankset. Simply remove the plastic cap covering the crankset threads and install this in its place. FITS MOST SPROCKETS - This chainring is designed to fit 42-44T, however, it can be modified to fit other bikes depending on personal preference. REDUCES CHAIN JUMPING - The Nexify chainring sprocket can also help reduce the likelihood of a chain "jumping" to the outside while shifting gears.