A: Yes it will work on tiles.
A: No. The price/cost is for 1 disc/pad. Picture is showing both sides of the disc. Sorry for the confusion.
A: Thank you for contacting Trex. Unfortunately this is not a Trex product related to decking or railing. You may want to contact Home Depot & they can assist you. Erin, Trex Customer Care Team
A: Yes They are flexible and can be used for polishing/grinding pool plaster. Most of our customers use the 7" 60 grit for better efficiency. Thanks,