When it comes to home gyms, there’s almost no better space-saving solution than adjustable dumbbells — they can turn nearly a dozen individual dumbbells into one. Unfortunately, some of the most popular adjustable dumbbells from Bowflex were just recalled by the U.

The U.S. Consumer Product Safety Commission has issued a voluntary recall of approximately 3.8 million adjustable dumbbells.

More than 300 reports of the weight plates becoming dislodged have been filed, with more than 100 of those cases resulting in injuries, the U.S. Consumer Product Safety Commission said.