Instruct: Classify the given Amazon review into its appropriate rating category
Query: didn't work with 40 blade

I Got the 8 piece stainless because it says it will work with a 40 blade. On the back of the comb you can flip between 10 and 30 (for those blade sizes). It falls off of my 40 blade if it gets hair caught in it, even with the magnet. I've been using my 10 blade. I still prefer the stainless combs to any plastic combs I have, but if you say it'll work with a 40 blade, it should work with a 40 blade (especially if it's an Andis blade)