Pre-combined sets - save money 100kg Olympic Weight Plates Rubber Coated Cast Iron - The rubber coating on the plates protects both the plate and your floor from accidental dropping as well as adding extra grip when handling for safety 51mm diameter hole so that they will fit all olympic bars - Solid construction and effective in design, Our Rubber Coated Olympic Weight Plates are made for everyday gym use, and designed for a snug fit in the hand Solid construction and effective in design, Our Rubber Coated Olympic Weight Plates are made for everyday gym use, and designed for a snug fit in the hand. The rubber coating on the plates protects both the plate and your floor from accidental dropping as well as adding extra grip when handling for safety Tri-Grip Handles plates 51mm diameter hole so that they will fit all olympic bars Centre Hole come with the metal Ring for moving the plate smoothly on the bar sleeve