I got tired of handing a guy twenty bucks to disappear in the back of a gun shop and possibly come back with a scratched slide. It's happened a couple of times at least. So I was on the Brownell's site for something else and just went ahead and added it to the order on general principle. It's from Wheeler and it looks to be relatively universal. There were other choices, but this fit my budget and wasn't so specialized as to be almost useless for my purposes. Now I can make my own scratches.