
So the sponge is held by these hooks which are very sharp but the trigger mechanism was too crude to use just fingers for fear I might somehow get my hand in the hook to open it. putting on a sponge for the first time. I kept moving the sponge because it was starting to loosen, I had to find a new healthy piece of sponge for the hooks to hook into, but I felt it was wearing out too quickly compared to how long hand sanding sponges last longer keep.

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