If a pipe isn't drawing right or the draw is not as free as it could be, you need the Carey Straight Shank Pipe Reamer. Sometimes pipe cleaners don’t go all the way through or when they do, they only partially clean the pipe. This pipe reamer works perfect when a regular pipe cleaner doesn’t do a good enough job. The 3mm diameter reamer fits most pipe shanks including all the Carey Magic Inch pipes. Includes both a shank drill and a pin vise with four collets. To be used with straight shank pipes only.