Maryton 4 Pieces Pumice Sticks Cleaner for Removing Toilet Bowl Ring, Bath, Kitchen, Pool, Grill,Household Cleaning

I had used every cleaner, solvent, chemical, etc. known to man. Nothing got rid of my stains around the water inlet holes, where that water drains into the bowl, and where the water sits in the bowl. Before purchasing these I thought, will it scratch the porcelain? I did my research. Nope, it will NOT scratch if used with a GENTLE scrubbing motion. Porcelain is a harder material than the pumice stone. That's why the pumice stone wears away, leaving a paste behind. I scrubbed GENTLY at first because I was still skeptical and didn't have $400 to invest in a new toilet in case I ruined it by scrubbing too hard to actually scratch the porcelain. I did not use the corners of the pumice stone. I used the wider edge and went with the shape of the bowl in an up and down and then side to side motion. The stone wore down to a curved shape on the ends, the same shape as the toilet bowl. So it was easier to scrub (lightly/gently) with the shape of the toilet bowl where the stains and ring were in the bowl. ALL OF THE STAINS AND RINGS ARE GONE. My toilet looks BRAND NEW. Amazing! I definitely recommend these! Thank youuuu!