The company says the locking mechanism on the ladders can jam, posing a serious risk to consumers.

The United States Consumer Product Safety Commission announced Thursday that about 122,250 units of Werner ladders were recalled due to the risk of falling.

The Illinois-based company said owners of the ladders being recalled should stop using them immediately and register at www.wernerco.com/recalls to begin the process for a full refund. Once owners have properly disposed of their ladders per Werner’s instructions, the company said it will issue a check for a full refund.