Body Solid SDRS550 Rubber Coated Hex Dumbbell Set 5 to 50 LbPatent pending SDS 'Secure Dumbbell System' combines one piece cast heads with steel inserts, pinned, press fitted, and welded. Their compact design makes them shorter in length and easier to handle than conventional dumbbells. Durable rubber coating prevents damage to floors and equipment. Does not include Dumbbell Rack Set includes: (2) 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 lb. Hex Dumbbells