Can be used for spear squid, etc. Sizes are: three size 3 and one size 2.5 My husband received these from an acquaintance, but we have no plans to use them, so we're offering them for sale. There are covers as well, which will be included. They are mostly unused and in good condition, but please check the photos for any rust. These are items stored at home by a novice, and this is my first time selling fishing tackle, so I plan to pack them carefully, but thank you for your understanding.