After a two-year fight to get Buckyballs off the market, the Consumer Product Safety Commission put a formal recall of the toy into effect.

Consumers will have a six-month window to apply for refunds for the sets of tiny, powerfully magnetic stacking balls. The refunds will be paid for by Craig Zucker, the former head of Maxfield & Oberton Holdings, which made Buckyballs.

Mr. Zucker’s personal liability is novel for product recall cases, which typically do not name individual company officers. Lawyers for Mr. Zucker fought the decision to name him personally, arguing he could ultimately be liable for an estimated $57 million of costs related to the recall.

But the commission said that as part of the recall agreement, which was reached in May, Mr. Zucker would be required to pay a maximum of $375,000 in refunds to consumers. Refund requests, which consumers can submit online, will not be honored once that money runs out.