MATERIAL:Weight Plates Made Of Pure Steel! The Olympic Weight Plates Are Cast With Four Layers Of Plating For Excellent Rust Resistance And Artistic Aesthetics. WEIGHT PLATES: The 2\'\' Center Hole Allows You To Easily Use Any 2\" Olympic Barbell For High Intensity Use In A Commercial Gym/Studio Or Home Gym And Is Perfect For Starting A Fitness Workout. SUITABLE FOR ALL TRAINING PROGRAMS: These weight plates are suitable for any Olympic or power lifter, bodybuilder, etc. Can bring you a variety of new workouts are perfect for the home gym. SAFETY:Enhances Grip On The Edge Of The weight Plate And The Effectiveness Of Weightlifting Strength Training,Keep Your Strength Training Plates In A Stable Position Even During Intense Workouts.