The one you have is better than the rake, in my opinion. I just got this thing called the "Furminator" and it works well on the Lab coat. I got for my newfie mix but the head is so small it would take a few years to get one undercoat out. The only downside is the cost. The big one is $60 American dollars. My new guy Hooch sheds so much though that I think it was worth it.
I don't have the package anymore but I'm pretty sure it has a money back guarantee. Maybe you can try it and send it back if you don't like it.
Oh, I have the fuminator . I only used it once and boy has Raiders coat been shiny since then. I think you can over do it though , so I only use when shedding is a problem. Then I brush everday wtih a soft plastic paddle brush love it.
We use a slicker brush or a comb during their shedding times. I am probably a bad lab mom, but probably only brush them like once ever couple of weeks. I give them vigorous scratches with my fingers though and brush off the hair with a towel almost daily. They love it.
Thanks for all of the suggestions. I think it was said best that there isn't just one grooming tool for the Lab coat. I will probably invest in the Furminator since I have all of the other products mentioned. I was looking around on eBay and found Furminators at a pretty low price. eBay rocks sometimes. Ha!
The zoom groom seems to work well for most Lab coats. Be careful with the really aggressive implements as they tend to strip all undercoat without differentiating between healthy and dead - you can end up with a coat looking like a wollen sweater washed in boiling water! For the blacks, stay away from the multiple metal prongs that dig up flakes of skin. Actually, it can't be great for the yellows either but it's really unsightly on the blacks.
Our favourite tool is an ordinary fine tooth metal comb with a comfortable handle - used at an angle, it gets out all that matted undercoat with minimal damage.