TKO is committed through sound and honest business practices to manufacture and design innovative quality boxing and fitness products that bring value and enjoyment to our customers, Countless hours are spent sourcing the finest materials working with our factories to produce and maintain the highest level of quality while laboring over the ""little details"" that make our products superior in today s marketplace, Patented Tri-Grip handle gripping system with new patented SDS design construction performs like no other product on the market, Will not spin or come loose like bulky bolt-together dumbbells, One piece solid cast and steel head design encased in rubber offers accurate weight and precision balance, Solid rubber two color end cap allows easy to read weight markings encased into surface, Encased with 6mm odorless durable rubber will not crack or fade and prevents damage to floors and equipment, Compact design makes SDS dumbbells much easier and safer to handle, Size: 55 lbs Handle size: 33mm Color: black US Patents #D496 414 #D504 923 SKU: TKO056