Another two points to make when reviewing track links. Mentioning the 'media' used, i.e., injection molded, resin, metal, etc., would be a huge help in determining a purchase...of any and all track links. Another statement that needs to be expressed is the issue of 'sink marks'...a killer (a non purchase) for me when looking for non rubber band replacements. When individual track link kits, workable or otherwise, cost as much as the kit they'll be used on, knowing about sink marks will make all the difference on my decision, and type, of purchase. Just my 2 cents!!! Good review however!!