Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Will this attachment fit Kitchaid Model KSM6573CER2 mixer sold thru Costco, it is a 6 quart, narrow bowl?
Document: I love my beater blade, so I'm giving this a 5. I agree with all of the great things that everyone says about this stand mixer attachment. HOWEVER--my stand mixer is a Professional 5 Plus, and though it is considered a 5 quart mixer, this blade DOES NOT fit. If you go to the BeaterBlade.com website, or to Amazon's webpage for the 6 quart KitchenAid BeaterBlade, you will find that the Pro5 line requires the BeaterBlade for the 6 quart KitchenAid models.
I have the 5 quart bowl and this did not fit. I made sure my model was listed before purchasing. It also felt very cheap and seemed like it would not last after many uses. I returned it and will be getting one that KitchenAid makes.
I bought one of these for my 6 quart KitchenAid a few months ago and every time I used my 5 quart I missed the way the New Metro cleaned the sides of the bowl, so I bought this for my smaller mixer. The New Metro web site told me what blade I needed for each mixer. I am glad I checked, as I had the wrong size in my Amazon cart.The blade does not seem as heavy duty as the original KitchenAid beater, but it seems to hold up well.
I watched a YouTube Video by SeriousCakes and was sold. It really cuts the time spent checking if the batter is mixed properly. A few times I had some of my ingredients flying out of the bowl, but it may be because I had the speed to high. The blade is well worth the money. Hope I can find one for my 4-quart mixer.
I recently bought a Kitchen Aid Pro 6 which I'd been lusting after for years. Expecting the problem of the five qt model to be resolved, I was disappointed to see this powerful beater slinging the contents of the bowl to the sides, repeatedly making me stop the bowl and scrape down again. I had a sideswipe beater blade for my 5 qt and it was great. Ordering the Beater Blade for my Pro 6 was a big mistake.
I went to use this thinking wow, this is the cat's meow, but unfortunately the neck is longer and it does not at all work in my 5 quart stainless steel mixing bowl that came with my Artisan Kitchenaid.I want to get the larger glass mixing bowl, so hoping it will work in that bowl. As far as the quality, it is a plastic, but I think it will hold up and it does fit on the mixer just fine, just don't work with the mixing bowl.
I love this new beater blade! Not only does it scape the sides as it mixes, but it doubles as a scaper when pouring the batter into the pan. Fabulous idea! You won't be disappointed!I have an older kitchenaid and could not find my exact model number on the beaterblades.com website. Since I have a 5 quart lift mixer I went with the KA 5L and it works perfect.
I have been seeing new blades in stores for the past yr. I always looked to see what models they were for on the package. Didn't want to waste $30.00 on something that wasn't for my model. Have the older K5SS ( in great shape ). Was happy to see it is listed for all 5qt Lift bowl models. That is what we need more of, listings of older and newer models that an attachment will work in, like all K5 model's etc.
Does not fit my 5 quart mixer even though it specifically states it does. Seems to be made of plastic or some kind of mold, is definitely not metal like the name brand one
This will not fit in a 5 quart mixer, you cannot adjust the head high enough for the blade to fit....I bought the blade from kitchen aide for 25.00 and it fits perfectly. Would not recommend
Answer: No, it will not.  I had one for another mixer, but when I bought the 6 quart from Costco, it did not fit.  I talked to Kitchenaid and they said at that time that they did not have a scraping beater for the Costco Kitchenaid.