Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Will this fir the Harbor Freight Chicago 4" biscuit joiner? It calls for 4" blade with 7/8" arbor, but I cant find the arbor size in the specification
Document: This is a very high quality blade that is chrome plated and has some major carbide on the teeth. The body of the blade is a little thinner than the Porter Cable blade I was replacing, so I had to add a washer to get the arbor to grip it. The teeth are the normal thickness so it cuts the proper biscuit size.
The blade looks fine, but does is too thin for my Porter Cable biscuit joiner. The blade fits the arbor, but will need a shim for the lock nut to tighten properly.
It was just that sharp and quiet compared to the (admittedly worn) stock blade. Kind of giggled over the dramatic difference in cutting speed and quality. The only resistance I could feel was the return spring in the joiner itself. Cut several test slots in plywood and hardwood, and the biscuits all fit snug.Highly recommended. If you have a PC 557 joiner, fear not. Get the blade and a shim or follow the advice to grind down the arbor a touch, and get cutting.
My Porter Cable 557 biscuit joiner was still sporting the original OEM blade from the late '90's, and when in use it was tough to plunge into the wood and always burnt the edges. It was well past time.I bought this blade purely on Freud's name. Most of my table saw blades are Freuds and I'm familiar with how they handle grinding their teeth.The FL102B that showed up was a marvel right out of the box.
Man, does it cut nice! And I know it's not just a matter of my PC blade being dull as prior to putting on the Freud, I had put on, for the first time, my new 2" Porter Cable blade (which came with the 557) and it was just as hard to cut with as the 4" P.C.
Having read the reviews about the fit on the Porter-Cable 557 (which I own), I purchased this blade nonetheless. With my dial calipers, I measured the blade about 0.01 inches too thin to be held by the arbor nut and flange. One can easily get pre-cut shim stock for arbors to take that up. Myself, I used a piece of polyester-backed sandpaper scrap that easily measured twice that, trimmed it and easily snugged it down.
Ordered it yesterday and it came today (thanks Prime). It's going on my Porter Cable 557 biscuit jointer (I have the version 2).Like others have already mentioned, the Freud blade is just a smudge thinner than the PC blade. I just used an air grinder to take about 1/128th off the shaft. Took longer for my air compressor to fill up than it did to knock off the edge.
This item is an original manufacturer product. Replacements are hard to find locally, and if found are more expensive.
The 8 tooth blade is much better than the 6 tooth. Well worth the extra money. Have cut more than 50 slots and still cutting clean and smooth.
This biscuit cutter blade is by far better than Porter Cables, and much cheaper. It is a little thinner where it mounts, but it can be shimmed easily.
Answer: yes