Iron Grip weight plates are available encased in heavy-duty urethane to prevent scuffing or damage to equipment, walls and floors. Iron Grip urethane plates are exceptionally durable, and will not split, peel or delaminate. They are also impervious to rusting, chipping, flaking and losing their color. And the plate’s integrated metal sleeve prevents contact between the urethane and the bar, providing a smooth, secure fit.