Exactly what I needed to replace on my garage door. Difficult to install - not because of the product but because of the nature of the repair. Required additional safety precautions due to the high tension springs. This product is directly connected to the springs through the winding spool at the end of the spring bar. (I am not using the technical terms as a DIY'er.) My research repeated warned of the issue with the springs.Still I am very pleased with the performance of the pair of 8' Garage Door Cables for torsion springs by National.Very good quality cables. Thicker than what I had originally! Perfect length for an 8 ft door. The actual cable length is 9’6”. Installed on our crooked door where one cable snapped. Everything is working great now. Highly recommend this product.These replaced my original wore out cables exactly. Great price and quality.What can I say, worked for my 8' tall door, reasonably priced, and received quickly...I bought these based on the height of my door opening but had to send them back. I’m sure they would work fine but my torsion bar is higher than my door opening would make you think—I have a high ceiling. So my cables once removed were 13’ long. My advice is to unlatch the door from the opener and push it all the way up the track. Then lock it in place with vice grips on the track. Remove a cable (see YouTube) and measure the actual cable length and order that size. Once I replaced the frayed, longer cable, the door leveled itself.They are exactly the same as OEM replacements and fit perfectly. They are a great replacement, for a really good price.HelpfulVery happy with put but they are not easy to install. No fault of product or supplierMy garage door cable loop broke on one side. I looked for it’s replacement in the stores but didn’t find the matching fish type end. Found this on amazon and it’s a good replacement. This cable was about an inch longer than the original one so I had to replace cables on both sides otherwise the door tilted on one side by just replacing one. The cable is slightly thicker but it didn’t matter, maybe the original one I had was inferior? Saved money of a service call!I ordered 8 foot cables; needed 7 foot.Bought to replace old one on the automatic garage door that broke, original from home builder. Garage door company came and install using this with no problem in less than an hour.Package arrived neatly packed, right size for 8' garage door as advertised and looks good quality. Though it is expensive compared to other sellers, satisfied with the purchase.I had bought new door edge brackets at Home Depot, but the attaching part didn't fit the existing cables. The new cables I bought here fit nicely because of round hooks at their ends.