These products by ShurHold, (9' handle with matching Handle Mate PFD AND a 10" Medium deck brush), were recommended by both boat owners docked on both sides of our boat. All 3 boats are over 40 feet and it usually takes around 2 hours plus to do a weekly wash.
LOVE it. the Handle is well balanced, fits great in my hands, and with the addition of the foam grips, I'm told should it fall in the water, it will remain floating. I have not tested that theory. : )
I have been using a 6" deck brush last year, (came with the boat), replacing it with an additional 4" seems to work much better with less scrubbing.
I give this product and the ShurHold staff 5 stars. Including for their service and follow up. Keep up the good work.