The Xpeed Standard Weight Plate is a grey hammertone weight plate with a 29mm diameter hole. In general, this style of weight plate is cheaper than the Olympic and Rubber Plated styles which have a 51mm diamter hole. The Xpeed Standard Weight Plates are a simple design, easy to use and suitable to fit most common standard bars and adjustable dumbbells. Some brands may have different diameter holes so it is important to know the sleeve diameter of the bar or dumbbell handles you intend to use.