50 pound set includes two textured solid chrome handles, four collars (8 lbs), four 3 pound plates, four 7.5 pound plates. * 60 pound set includes two textured solid chrome handles, four collars (8 lbs), four 5 pound plates, four 8 pound plates * 52.5 pound set includes one textured solid chrome handles, four collars (5 lbs), eight 5 pound plates, two 2.5 pound plates. two 1.25 pound plate * 105 lbs is two of the 52.5 pound set (above) * Collars and handles are threaded for a secure fit; Plates are made from durable cast iron