1Specifications: This kit provides 3 pieces pipe reamer step bits with 3 different specifications of 19mm, 24mm, and 31mm, which are accurate and reliable, meeting the needs of different pipe reaming. 2Product Usage: These pipe reamer bits are suitable for expanding holes in PPR, PVC, and other plastic pipes, accelerating the installation process of pipes and saving you time on pipeline maintenance. 3High Carbon Steel: These pipe reamer drill bits are made of excellent high carbon steel, with high strength, wear resistance, heat resistance, no deformation, greatly extending the service life of the bits. 4Strong Compatibility: These PVC pipe reamer bits have a standard shank diameter, are compatible with most electric drills, easy to install and replace, and provide flexibility and convenience for plumbing tasks. 5Efficient and Practical: These PPR pipe reamer bits feature fine processing, internal and external deburring helps to achieve seamless connection for an efficient piping system, reliable and practical. 3 xPipe Reamer Bits