These are chainsaw chains that are more than 30% worn. I sort them out according to sizes in buckets and resell them in batches of 10 for $7.00 a batch. A lot of chains are still very usable If you want to sharpen them yourself, and the pricing comes out to 70 cents per chain in the batches. It's just not worth my time to sharpen them on my machine and resell them as a quality product. A couple of landscapers buy them from me, because at that price, it's worth it to them to take the time to sharpen them at knight themselves and then use them during the day. When they're cutting roots and other crap that destroy chainsaw blades, so they don't ruin their good expensive blades, which are far more costly and save their good chainsaw blades for the trees. Please check out my other ads where I explain about my other businesses selling chainsaw blades, sharpening them, and also repairing chainsaws.