Sold in packs of 10 - when you select the quantity you’d like to buy, you’re choosing how many packs of 10 you want. Choose “1” and you will receive 10 flechettes. If you’d like 50 or more, message me for a discount! The red bits in the photos are not rust. Some of the pieces have red paint on the fins, and they all have a little grease on them to prevent rust (the grease has a red tint to it).