### Clue: Worker strikes result in restriction on movement (9)
### Answer: HANDCUFFS 
 ### Explanation: Definition: result in restriction on movement
 HAND(a Worker, especially of manual labour or general duties) + CUFFS(blows,strikes, especially with the open hand).
Answer: What are used to secure,result in restriction on movement, eg. to prevent the restricted from cuffing someone. Nice surface.