Plastic Full Round Yellow Guy Guard / Guy Marker Plastic Guy Guards are a must on guy wires used on challenge courses, climbing towers and ropes courses. These guy guards come with Stainless Steel Wrench-Down Bolt - includes stainless steel bolt for tightening unto the guy wire with a wrench. Install them at full length on the ground so people and animals can see the cables day or night and not walk into them. For more information on guy markers or guards visit www.guyguards.com