MTN Gearsmith New Heavy Duty Adjustable Cast Iron Chrome Weight Dumbbell Set Dumbbells 52.5 100 105 200 lbs High quality cast iron adjustable weight dumbbell set (finish in black painted or Chrome coated) Single pc dumbbell kit: 52.5 lbs and 100lbs dumbbell set (finish in black painted or Chrome coated) Double pcs dumbbell kit: 105 lbs (2pcs x 52.5lbs) and 200 lbs (2pcs x 100 lbs) dumbbell set (finish in black painted or Chrome coated) Collars and handles are threaded for a secure fit; Plates are made from durable cast iron