Possible Clues:

• It's all for strength althougjh it's only hair
• It gives strength, although it's just hair
• Although it's hair, that makes it stronger
• Reinforce lock on bar
• Projecting support for building
• Even so, what's a prop doing with long hair?
• It could be flying, although it's only hair
• Projecting support for a 21 ac
• Projecting support for wall
• Makes it strong, although it comes out on ahead