However, this usage means that cheap handcuffs are used in times where steel ones would normally be unused for long times. Recent products have been made that deal with this. These include disposable plastic restraints that can be opened with a key. These are more expensive than traditional plastic restraints, since they can only be used for a small number of times, and are not as strong. In addition, many people think plastic restraints are more likely to cause nerve or soft-tissue damage to the wearer than metal handcuffs.