DETROIT (AP) — The U.S. government’s road safety agency is warning people not to use Pittsburgh Automotive jack stands sold by Harbor Freight Tools because they can collapse when holding a load.

The National Highway Traffic Safety Administration says Harbor Freight is recalling over 1.7 million three-ton and six-ton steel jack stands.

The agency says the jack manufacturer has reported six injury claims from use or assembly of the six-ton stands and five injury claims from using the three-ton stands. None of the injuries was life threatening, the agency said.

The stands were manufactured by Jiaxing Golden Roc Tools Co. of China from December of 2012 through March 31, 2020. The company determined that the stands are faulty due to aging of production equipment.

The recalled three-ton stands have item numbers 61196 and 56371, and the six-ton stands have an item number of 61197.

Agency documents say Harbor Freight Tools will give buyers a gift card equal to the purchase price of the stands.