Reamers/Reamers are classified as Hss,Pm(Powder metallurgy), Carbide,Pcd, Cbn reamers according to the materials they are manufactured from. According to its geometry, cylindrical handle, conical handle reamers, adjustable reamers, hand reamers are. It is a process performed to bring the hole to the desired size with a precise surface finish. It is used in cases where the tolerance of the hole size drilled with a drill cannot be achieved.In cases where the tolerance is narrow, the hole is processed smaller and measured with a reamer.