Plate Mate Hex (Pair) at Power Systems, Inc. Magnetic add-on weights attach quickly and easily to the ends of most iron/steel dumbbells. Magnets must come in direct contact with metal for an ultimate hold. Black.
Make sure this fitsby entering your model number.
Easily attaches to weight stacks and dumbbells to adjust weight increments
Works with steel or cast iron plates and dumbbells
These units will not stick to rubber-encased plates or dumbbells.
When used on steel plates/dumbbells: make sure that the whole magnet is is contact with the plate or dumbbell.