Ordered some 4.5 mm files and a new chain from Amick. They called to see if I was going to use the files on that chain because they were the wrong size for it. I needed some 4.5mm for my other chain so got 6 of one size and 6 of the other. I'm impressed with the service there and the shipping was only 4.05 $ for a chain and 12 files. Two thumb up for them.