This is an item being sold because I imported a large quantity for personal use. These are budget strings, but my personal impression is that they are better than the original strings sold at a certain musical instrument store. I set them up normally on a Floyd Rose. The next day, the tuning was only slightly off. They worked fine as practice strings. Recently, prices have been going up, so it's becoming difficult to find good strings at a low price. I think these are a good value considering the price and quality. Important Notes: The strings are generally shorter than usual. The 1st string is long, and the 6th string is short, so on my reverse headstock guitar (where the 6th string tuner is furthest away), I couldn't wind the 6th string because it was too short. They worked fine on normal headstocks like Les Pauls and Strats. Please note that these strings are not usable on reverse headstock guitars.