FreeMotion Fitness Inc. is recalling about 5,600 Cable Cross and Dual Cable Cross exercise machines, the U.S. Consumer Product Safety Commission has announced.

The CPSC reported that a pin used to secure the weight plates can fall out of its slot, causing the we ights to drop suddenly.

The company has received nine reports of consumers suffering contusions to the head and shoulders from falling weights.

The recall involves the machines with the model numbers GZFM6006 and GZFM6024, which were sold from December 1999 through May 2006 for between $3,750 and $4,500 US.

Consumers can call FreeMotion Fitness Inc. at (800) 201-2109 between 8 a.m. and 3 p.m. ET Monday through Friday for more information.

Recall notice