USE AS NEEDED: You Can Hang It on The Fence or On the Net (Outside the Doubles Sideline) To Allow Viewers to Follow the Score of The Match; EASY TO USE: Players Just "Dial" Or Turn the Numbers Manually to Change the Score. Each Unit Comes With 2 "S" Hooks And 4 Tie-Wraps for Either Temporary or Relatively Permanent Installation; FOR TEMPORARY USE: Apply The "S" Hooks to Hang the Unit Temporarily on The Fence or Net; FOR PERMANENT USE: Apply the Tie-Wraps to Secure the Unit More Permanently; UV PROTECTION: New and Improved UV Protection Designed to Stop Gradual Fade Over Time in Direct Sunlight. Rust-Free