Terry Fox Run, Run for the Cure, and Relay for Life are all terms most Canadians know. They know what it means, they know what it stands for, and they know someone who has been affected by this disease. Knitted Knockers, however, not so much. What are they? Where did they originate? Who are they for? How are they made? Where do you get them if they need one? Knitted Knockers are a light comfortable knitted prosthetic alternative for women who have had a mastectomy.