A reamer is a type of rotary cutting tool used in metalworking. Precision reamers are designed to enlarge the size of a previously formed hole bya small amount but with a high degree of accuracy to leave smooth sides. There are also non-precision reamers which are used for more basicenlargement of holes or for removing burrs. The process of enlarging the hole is called reaming. There are many different types of reamer and theymay be designed for use as a hand tool or in a machine tool, such as a milling machine or drill press.Higred Tools Company can provide following Reamers：1.Hand Reamer；2.Machine Reamers；3.Pin Reamers;4.Tapered Reamers;