IPA Tools #8076 Series Carbide-Tube Pin Cleaners have a preformed tube design to quickly and efficiently clean the phosphorus buildup that accumulates on pins, pipes and tubes. This 10-piece set can be used to safely remove corrosion, scaling and rust on items such as copper piping. This will ensure a clean surface prior to soldering, welding or painting. The material is 10 times more durable than common sand paper and uses an interior 240-grit carbide. The 10 precise diameter sizes include .217, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16 and 3/4 inches, with other sizes available up to 3 inches. 888/786-7899; www.ipatools.com.