Back in the early 90’s, Odyssey made the bolt-on Havok Sprocket Pocket (plastic guard) as well as the Utility Sprocket in the early 2000’s. Odyssey see's the new Utility Pro as a modern nod to both of those. The sprocket is 7075-T6 aluminum and comes with a replaceable and removable proprietary plastic guard. The sprocket looks great on its own, so you can run it with or without the guard. The choice is yours.