The single channel guard was exactly what I needed. I had an extension cord run from the house to my garage, which is about 85-90 feet. Because of the distance a fairly heavy extension cord was required. Unfortunately, cars using my driveway were mashing the wire & damaging the insulation. I tried one package of 4 cable/wire protectors and my new extension cord is still looking new. Instead of constantly replacing a damaged cord, I'm able to use the cord as intended & keep it safe from the trucks & cars that roll over my driveway daily. Last fall, I had to replace 3, one hundred foot 10 guage extensions. A new one every 3-4 weeks. Nearly 2 months since the protectors, & extension cord is still pristine. Thanks for a great product @ a reasonable price. Count on me to recommend your product.