Pack of 12 Tent Line and Tarp Tie Down Clip Secure Line Locks Heavy Duty Camping Outdoor Gear. Keep those guy lines taut without the fancy knots. The Tent and Tarp Line Locks by Gear Aid can be used as replacements for broken line locks, or added to tarps without any. Just attach the tension lock to any tent or tarp, thread the cord through, pull the line taut and secure. Your shelter will be secured so you can sleep easy. Package Includes: - 12 Gear Aid Line Locks.