Picote PVC chains are available as the Cyclone and Original designs, and do not have carbide inserts, making them safe for use inside PVC pipes. The chains are used with the Picote Micro or Mini Miller machines, utilizing the 1/3-inch-diameter shaft in 2-, 3- and 4-inch-diameter pipes. When used with the Midi and Maxi Miller machines with its 1/2-inch shaft, the chains can be used in 4- and 6-inch-diameter pipes. 219/440-1404; www.picotesolutions.com.