This series of Starbrite Scrubbers is available in coarse, medium, and fine grades.
This scrubber is the black, coarse scrub pad for heavy duty scrubbing.
It is ideally suited for cleaning boat hulls since it is aggressive enough to remove both hard growth and tenacious varieties of soft growth.
Includes one short handle/knob and three black/coarse scrubbing pads.
Use the pad as a hand scrubber or attach it to any Starbrite Premium Handle using the #40030 Knuckle Attachment (all sold separately), which allows you to scrub while standing up.
When used with the included short handle, you can reach over and clean the sides of the hull while inside the boat.