Replace problem cranks that interfere with the proper closure of your blinds and shades. All cranks are made of metal. They will not strip or break like plastic handles that are found in most hardware stores.
For more information:
Fix My Blinds Inc.
5863 Terminal Ave
Colorado Springs, CO 80915 US Email: webmaster@fixmyblinds.com (719) 597-0696 Fax: 866-550-6115