1. The axle made by high strength chrome, bend proof, can support more than 500lbs.2. The sprocket can be changed to other type, just make sure the dimension same as this 428 chain sprocket.3. The axle is symmetric, so the brake and sprocket can be moved to a different location.4. Perfect for vertical or horizontal engines with any displacement and electric motors.5. Fits 6″-10″ wheels with 3″ distance from bolt hole to another contiguous bolt hole.6. It has almost all the rear-end parts you need. Come with:(1) Axle(1) Brake disc(1) 428 chain sprocket(1) 1″ Pillow block bearings(1) 4 bolt pattern wheel hub(1) 1x seat(1) 1x 428 chain 106 Links(1)1x brake caliper master cyclinder