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1. Put the barbell jack on the ground. 2. Roll the first weight plate into the groove then load the others. 3. Roll out the plates. Made from special rubber, hold 900lbs easily. Enough clearance to change plates. Handy and portable. Designed to fit all the bars and plates. Keep the plate from rolling around, no noise anymore and protect the floor from scratching. 1 pair, that's all you need.




