Love the lightweight, quality anddurability of all included items. Out of all the tons of cat toys I've purchased for my two cats this is up there in the top three ultimate best toys for your cat . I purchased the two cat ones with the 2 mm elastic string several cat feather toys and a couple of the fuzzy worms all in one pack.I've purchased this item 4 years ago and a second time after 2 years because eventually the feather toys will need replacement which is pretty standard because the feather will fall out here and there from the cat playing with them or they might get broken or bent over typical use and time. You could feasibly glue a feather or two back in but honestly it's not that big of a deal it's just typical where and cats will still play with them even if a feather or two might be missing or broken from one of the attachments.I love that these ones are retractable and they have a phone comfortable handle. I also love the elastic string as opposed to some might come with a plastic string in which case a plastic string isn't quite as forgiving it doesn't have as much freedom of movement.I appreciate it how each feather toy comes with a bell attached and the metal Loop.As I said the pack included two wands of the same length which are very flexible as a fishing pole would be for example.Each of the ones comes with the elastic string attached which is a few feet in length which feels just about right, not being too long and not being too short.Each of the two nylon strings comes with a metal clasp at the end which easily can attach to any of the toys.Over time I have experienced if your cat is unsupervised they may play with the string and could wear the string down from chewing.Additionally I have experience with my cat if left unsupervised he will want to play with the foam handle chewing and kicking at it and have fun supervised over time can create damage. With that said the phone handle can easily slide off and potentially be replaced or in my case I put a little bit of tape at the end. But again this is after 4 or 5 years of use.I believe I do recall with one of my two purchases one of the nylon strings broke within the first couple months and I did reach out to the manufacturer who sent me a replacement one for free immediately which really impressed me.I would say that my only complaint, if you could call it a complaint is that the seller and or manufacturer doesn't have a direct way to order replacement string. Not that I have really needed that just yet, however I did have to do a little research to figure out what material and size the string is and how to get my hands on it.Basically if you want replacement string, and again after 5 years I really haven't had the need yet, you would need to search Amazon for 2 mm black nylon string. A search for that includes rolls of string anywhere from about 10 to 100 yd for six to 10 or so dollars.