I have several chains of different sizes in my workshop. They don't work with my CNC/laser machine - they just twist round and round when you try to tighten them. They don't work in full size/wide lanes. They work on smaller/narrow lanes. Base 13/32"x5/8". So if the ID on the inside of the rail is more than 5/8" wide, they won't work. With the right track, they work great.